Relevant bibliographies by topics / Nitrogen Alloying

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  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers

Academic literature on the topic 'Nitrogen Alloying'

Author: Grafiati
Published: 30 June 2021
Last updated: 2 February 2022

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Journal articles on the topic "Nitrogen Alloying"

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Foct, Jacques, Christophe Domain, and Charlotte S. Becquart. "High Nitrogen Steel and Interstitial Alloying." Materials Science Forum 426-432 (August 2003): 161–70. http://dx.doi.org/10.4028/www.scientific.net/msf.426-432.161.

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Wang, K. Y., G. L. Chen, and J. G. Wang. "Mechanical alloying Ti50Al50 in nitrogen atmosphere." Scripta Metallurgica et Materialia 31, no. 1 (July 1994): 87–92. http://dx.doi.org/10.1016/0956-716x(94)90100-7.

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Maznichevsky, Alexander N., Radii V. Sprikut, and Yuri N. Goikhenberg. "Investigation of Nitrogen Containing Austenitic Stainless Steel." Materials Science Forum 989 (May 2020): 152–59. http://dx.doi.org/10.4028/www.scientific.net/msf.989.152.

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An important factor in solving the problem of stainless steel corrosion resistance is carbon concentration reduction. However, a decrease in carbon content of austenitic steels leads to a drop in level of their strength properties. Theoretically, nitrogen alloying can lead to a strength increase in all types of austenitic corrosion-resistant steels. Practically, nitrogen alloying is effectively only with low-carbon compositions. This work shows the effect of nitrogen on the mechanical properties of middle-alloying nitrogen, containing stainless steel, and a study of AISI 304L and pilot steel with different nitrogen content (from 0.16 to 0.30 wt. %). Nitrogen increases strength of steel, which is approximately 30-60% higher than for steel without nitrogen, but reduces technological plasticity. Pilot steels show high corrosion resistance and fine austenite grains.
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Ziatdinov, M. Kh. "From the history of nitrided ferroalloys." Izvestiya. Ferrous Metallurgy 63, no. 10 (December 10, 2020): 773–81. http://dx.doi.org/10.17073/0368-0797-2020-10-773-781.

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The article considers research on the history of nitrided ferroalloys appearance and development of technologies for nitrogen-containing steels and ligatures. The most important advantages of nitrogen as an alloying element are its availability and almost unlimited reserves in nature. The technology of nitrogen extraction does not cause any harm to the environment and is not accompanied by the formation of waste. New technologies of nitrided ferroalloys and new compositions of nitrogen-containing ligatures emerged as a response to the creation of new grades of nitrogen-alloyed steels. At the same time, researchers in Europe, the United States, and the Soviet Union made the greatest contribution to the development of nitrided steel and ferroalloys technology. Nitrided ferrochrome emerged from the need for alloying stainless steels of various classes. Nitrided ferrovanadium was created for microalloying high-strength low-alloy steels. For nitrogen alloying of transformer steel, an alloying material based on silicon nitride was developed. Nitrogen-containing compositions based on manganese are universal alloying materials for a wide range of applications. Technologies of nitrided ferroalloys developed in the direction of creating compositions with the maximum nitrogen content with minimal consumption of material resources. Currently, technologies for direct introduction of nitrogen gas into liquid metal during out-of-furnace processing are being successfully developed. Alloying with its solid carriers remains a universal method for smelting nitrogen-containing steels. Nitrogen in nature occurs exclusively in a gaseous form, so for introduction to steel, it is necessary to fix it in the composition of a solid substance. At the same time, such a nitrogen-containing material must be compatible with the steel melt and technological in use. This problem is completely solved by the technology of self-propagating high-temperature synthesis (SHS), which allows obtaining composite ferroalloys based on nitrides, with properties that are unattainable for the furnace process.
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Rashev, Ts V., A. V. Eliseev, L. Ts Zhekova, and P. V. Bogev. "High nitrogen steels." Izvestiya. Ferrous Metallurgy 62, no. 7 (August 22, 2019): 503–10. http://dx.doi.org/10.17073/0368-0797-2019-7-503-510.

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The article provides a brief overview of the properties and production technology of high-nitrogen steels (HNS), which have several advantages over traditional ones. The main advantages are: up to four times higher yield strength with unique preservation of the remaining characteristics; reduction in consumption or a 100 % elimination of the use of some expensive alloying elements, such as Ni, Mo, Co, W, and others; effective alloying with unconventional elements (Ca, Zn, Pb, etc.). The basics of HNS technology, dependence of the properties on nitrogen content in steels, producing technologies for ferritic-pearlitic, martensitic and austenitic steel, their properties and applicability are discussed. Alloying with nitrogen for ferritic-pearlitic steel requires more precise adherence to the chemical composition in order to prevent the formation of insoluble nitrides during heat treatment (due to its greater solubility compared to carbon). Features of martensitic steels are associated with the possibility of formation of nitrides and carbonitrides during tempering. The possible effect of nitrogen in these steels may be as a decrease in the size of nitride particles as compared with carbide ones. Increased stability temperature of nitrides and carbonitrides provides increased mechanical and physical properties. In austenitic steels, nitrogen, due to the strong γ-forming equivalence to nickel, replaces it in a ratio of 1 kg of nitrogen ≈ 6 – 39 kg Ni. In austenitic-martensitic steels, the main role is played by thermal martensite. Stable austenite is obtained in the process of its aging at operating temperatures. Examples of effective use of HNS in important details are described.
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Rawers, J., D. Govier, and D. Cook. "High Nitrogen Steels. Mechanical Alloying of Nitrogen into Iron Powders." ISIJ International 36, no. 7 (1996): 958–61. http://dx.doi.org/10.2355/isijinternational.36.958.

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Merkushkin, Eugeny A., Vera V. Berezovskaya, and Mikhail A. Serzhanin. "Regularities of the Influence of Substitutional and Interstitial Alloying Elements on the Corrosion Properties of Austenitic Stainless Steels." Defect and Diffusion Forum 410 (August 17, 2021): 336–41. http://dx.doi.org/10.4028/www.scientific.net/ddf.410.336.

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Pitting corrosion studies were carried out on nitrogen containing austenitic stainless steels of different compositions and concentrations of alloying elements. As was shown there is a certain predicted influence of the concentration of each alloying elements as chromium, manganese, nickel, carbon and nitrogen on the pitting potential (Eb) of investigated steels with the nitrogen content less than 0.169 wt. %. However with an increase of the nitrogen content to a certain value (in our study up to 0.82 wt. %) the predicting of alloying elements influence on pitting potential of the steels requires a new approach. Based on the analysis of the experimental results and to take into account the influence of all alloying elements in steel on the pitting potential, a regression equation is proposed. In the presence of nitrogen, the positive role of carbon on the pitting resistance of stainless steel was shown, and the critical values of the total content (C + N) and the C / N ratio were determined, allowing prediction of the best composition of stainless steel.
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Lipodaev, V. N. "Nitrogen alloying of weld metal in arc welding of corrosion-resistant steels (Review)." Paton Welding Journal 2019, no. 6 (June 28, 2019): 59–64. http://dx.doi.org/10.15407/tpwj2019.06.12.

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Efstathiou, C., and H. Sehitoglu. "Strengthening Hadfield steel welds by nitrogen alloying." Materials Science and Engineering: A 506, no. 1-2 (April 2009): 174–79. http://dx.doi.org/10.1016/j.msea.2008.11.057.

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Simmons, J. W. "Overview: high-nitrogen alloying of stainless steels." Materials Science and Engineering: A 207, no. 2 (March 1996): 159–69. http://dx.doi.org/10.1016/0921-5093(95)09991-3.

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Dissertations / Theses on the topic "Nitrogen Alloying"

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Heikkilä, Irma. "The Positive Effect of Nitrogen Alloying of Tool Steels Used in Sheet Metal Forming." Doctoral thesis, Uppsala universitet, Tillämpad materialvetenskap, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-198747.

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Sheet metal forming processes are mechanical processes, designed to make products from metal sheet without material removal. These processes are applied extensively by the manufacturing industry to produce commodities such as heat exchangers or panels for automotive applications. They are suitable for production in large volumes. A typical problem in forming operations is accumulation of local sheet material adherents onto the tool surface, which may deteriorate the subsequent products. This tool failure mechanism is named galling. The aim of this work is to explain the mechanisms behind galling and establish factors how it can be reduced. The focus of this work is on the influence of tool material for minimum risk of galling. Experimental tool steels alloyed with nitrogen were designed and manufactured for systematic tribological evaluation. Reference tool materials were conventional cold forming tool steels and coated tool steels. The sheet material was austenitic stainless steel AISI 304, which is sensitive for galling. A variety of lubricants ranging from low to high viscous lubricants were used in the evaluation. The properties of the tool materials were characterized analytically and their tribological evaluation included industrial field tests and several laboratory-scale tests. The testing verified that nitrogen alloying has a very positive effect for improving galling resistance of tool steels. Tool lives comparable to the coated tool steels were achieved even with low viscous lubricants without poisonous additives. The hypothesis used for the explanation of the positive effect of nitrogen alloying is based on the critical local contact temperature at which the lubrication deteriorates. Therefore, the contact mechanism at the tool-sheet interface and the local energy formation were studied systematically. Theoretical considerations complemented with FEA analysis showed that a small size of hard particles with a high volume fraction gives low local contact loads, which leads to low frictional heating. Also, an even spacing between the hard particles and their frictional properties are of importance. Nitrogen alloyed tool steels have these properties in the form of small carbonitrides. The finding of this work can be applied to a wide range of applications that involve sliding metal contacts under severe tribological loading.
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van, Niekerk Cornelis Janse. "In-situ alloying of AISI 410L martensitic stainless steel with nitrogen during laser cladding." Diss., University of Pretoria, 2016. http://hdl.handle.net/2263/61341.

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The feasibility of in-situ alloying of AISI 410L martensitic stainless steel with nitrogen during Nd-YAG laser cladding was investigated with the aim of achieving a nitrogen content of at least 0.08 wt% and fully martensitic microstructures in the final clad deposit. Two in-situ nitrogen alloying techniques were studied. In the first set of experiments, the absorption of nitrogen from nitrogen-rich gas atmospheres was studied. Laser cladding with commercially available AISI 410L powder was performed using nitrogen-rich shielding and carrier gas. A marginal increase in deposit nitrogen content was observed, with the clad deposit displaying low hardness and mostly ferritic microstructures. Poor nitrogen absorption from nitrogen-containing atmospheres during Nd-YAG laser cladding is generally attributed to the short thermal cycle and to suppression of plasma formation above the weld pool. In the remaining experiments, Si3N4 powder was investigated as an alternative source for nitrogen during cladding. The addition of Si3N4 to the AISI 410L powder feed resulted in clad microstructures consisted of columnar -ferrite grains with martensite on the grain boundaries, higher hardness and an increase in deposit nitrogen content (to a maximum of 0.064 wt% nitrogen). Higher nitrogen contents in the clad deposit, however, significantly increased the volume percentage porosity in the clad layer. This prompted an investigation into the feasibility of raising the nitrogen solubility of the alloy through additions of manganese and nickel to the powder feed. Thermodynamic modelling revealed that the addition of manganese to AISI 410L powder increases the nitrogen solubility limit due to its negative interaction parameter with nitrogen. The addition of up to 3.5 wt% manganese to AISI 410L powder containing Si3N4 significantly increased the nitrogen solubility in the deposit. A martensitic microstructure with 0.12 wt% nitrogen and a peak hardness of 410 HV was achieved without any adverse increase in porosity in the clad layer. The clad nitrogen content easily exceeded the minimum requirement of 0.08 wt%. High nickel concentrations in AISI 410L stainless steel expand the austenite phase field at the expense of -ferrite and alter the solidification mode from ferritic to austenitic-ferritic. The addition of up to 5.5 wt% nickel, or combinations of nickel and manganese, to the nitrogen-alloyed AISI 410L powder feed raised the deposit nitrogen content, but not to the same extent as those deposits alloyed with manganese only. Since more austenite is present on cooling in nickel-alloyed AISI 410L deposits, less nitrogen is rejected to the liquid phase on solidification, resulting in higher nitrogen contents and less porosity in the room temperature microstructures. The amount of dilution during single-track laser cladding is mainly influenced by the specific energy per unit mass delivered by the laser beam. The clad height is strongly influenced by the powder deposition rate, whereas the bead width is influenced by the wettability of the deposits during laser cladding. During multi-track cladding, the observed percentage porosity is a function of the aspect ratio of the individual beads making up the clad layer, the deposition rate and the clad height. High deposition rates result in thicker layers, increasing the distance that N2 gas bubbles have to travel to escape to the atmosphere, while a high aspect ratio favours interbead porosity. The results suggest that in-situ nitrogen alloying during laser cladding should preferably be performed at low deposition rates to ensure higher clad nitrogen contents and hardness, lower clad heights, less dilution and less porosity.
Dissertation (MEng)--University of Pretoria, 2016.
Materials Science and Metallurgical Engineering
MEng
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Bergman, Ola. "Studies of oxide reduction and nitrogen uptake in sintering of chromium-alloyed steel powder." Licentiate thesis, KTH, Materials Science and Engineering, 2008. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-9555.

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The powder metallurgy (PM) process route is very competitive for mass production of structural steel components with complex shape, due to efficient material utilisation, low energy consumption, and short overall production time. The most commonly used alloying elements are the processing friendly metals Cu, Ni and Mo. However, the prices for these metals are today high and volatile, which threatens to make the PM process less competitive compared to conventional metal forming processes. Consequently, there is a strong desire in the PM industry to increase the use of less costly alloying elements. Cr is an attractive alternative since it, besides low cost, provides high hardenability and also recyclable components. The drawback is that Cr has high affinity for oxygen, which makes oxidation and oxide reduction in PM processing of Cr-alloyed materials a challenging issue. Furthermore, the interaction between nitrogen and Cr-alloyed powder during processing is important to consider, since Cr also has high nitrogen affinity and is prone to form nitrides.

The aim of the research work presented in this thesis was to study oxide reduction and nitrogen uptake in sintering of Cr-alloyed steel powder. Water-atomized powder grades pre-alloyed with 1.5-3% Cr were used as test materials. Sintering experiments were performed in N2/H2 (90/10) atmospheres with test bars pressed to density 7.0-7.2 g/cm3. The oxygen content of the sintering atmosphere was varied and different sintering temperatures and cooling rates were applied. The experimental study has been complemented with thermodynamic calculations using the software Thermo-Calc.

The oxygen partial pressure should be below 4 x 10-18 atm in order to have reducing conditions during sintering at 1120°C of steel powder pre-alloyed with 3% Cr. With graphite added to the powder, conditions are reducing at higher oxygen partial pressures (up to 10-16 atm) due to favourable conditions locally in the material. Sintering at 1120°C for 30 minutes leads to incomplete reduction of Cr-oxides in the Cr-alloyed PM grades, but remaining oxides are not detrimental for mechanical properties of the PM components. Increased sintering temperature is beneficial for the oxide reduction kinetics and practically all oxides are reduced after sintering for 30 minutes above 1200°C. Nitrogen uptake by Cr-alloyed steel powder from N2-based sintering atmospheres is strongly dependent on the cooling rate applied after sintering. No nitrides appear in the sintered material and mechanical properties are not affected when normal cooling rates (0.5-1°C/s) are applied. Very low cooling rates (such as 0.05°C/s) may lead to grain boundary precipitation of Cr-nitrides in the sintered material.

 

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Nilsson, Hultén Leo. "Nitrogen Without Oxygen : The effect of ferroalloys added after vacuum treatment on cleanliness of nitrogen-alloyed tool steel." Thesis, KTH, Materialvetenskap, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-298093.

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Nitrogen-alloyed tool steel is made at Uddeholms AB by adding high-nitrogen ferroalloy after vacuum degassing where introduced impurities are hard to remove. In this thesis two types of high-nitrogen ferrochromium are compared, a solid version and a powder cored wire. They are examined in crossection and 16 samples from four charges are examined with Pulse Distribution Analysis as well as systematic microscopy of polished cross sections. The PDA results missed smaller spinel inclusions shown in previous research to be detrimental. The wire form shows promise but more charges need to be evaluated before a conclusion is drawn.
Kvävelegerat verktygsstål tillverkas hos Uddeholms AB genom tillsats av kväverika ferrolegeringar efter vakumavgasning, och orenheter som introduceras i detta steg är svåra att avskilja. I den har uppsatsen jämförs två typer av kväverikt ferrokrom varav en i form av stycken och en i form av tråd med pulverkärna. De undersöks i tvärsnitt och totalt 16 prov från fyra charger undersöks med PDA (pulsfördelningsanalys) och systematisk mikroskopering i tvärsnitt. Resultaten från PDA missade mindre inneslutningar av spinell vilka tidigare har visat sig problematiska. Trådformen verkar lovande men fler charger behöver undersökas för att kunna dra en definitiv slutsats.
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Books on the topic "Nitrogen Alloying"

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Lakomskii, V. I. Alloying Liquid Metal with Nitrogen from Electric ARC Plasma. Cambridge International Science Publishing, 1999.

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Book chapters on the topic "Nitrogen Alloying"

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Foct, Jacques. "Unexplored Possibilities of Nitrogen Alloying of Steel." In Advanced Steels, 363–66. Berlin, Heidelberg: Springer Berlin Heidelberg, 2011. http://dx.doi.org/10.1007/978-3-642-17665-4_37.

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Kagawa, Akio, and Taira Okamoto. "Partition of Alloying Elements in Freezing Cast Irons and its Effect on Graphitization and Nitrogen Blowhole Formation." In Foundry Processes, 135–62. Boston, MA: Springer US, 1988. http://dx.doi.org/10.1007/978-1-4613-1013-6_4.

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Reed, R. P., P. T. Purtscher, and K. A. Yushchenko. "Nickel and Nitrogen Alloying Effects on the Strength and Toughness of Austenitic Stainless Steels at 4 K." In Advances in Cryogenic Engineering Materials, 43–50. Boston, MA: Springer US, 1986. http://dx.doi.org/10.1007/978-1-4613-9871-4_4.

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Murakami, Ryo, Yousuke Aoyama, Noriyuki Tsuchida, Yasunori Harada, and Kenzo Fukaura. "Microstructure and Mechanical Properties of Ni-Free High Nitrogen Austenite Stainless Steels Fabricated by Mechanical Alloying Method." In Materials Science Forum, 37–40. Stafa: Trans Tech Publications Ltd., 2007. http://dx.doi.org/10.4028/0-87849-462-6.37.

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Aoki, K., A. Memezawa, X. M. Wang, and T. Masumoto. "Amorphization of the group 5A metals by mechanical alloying in a nitrogen atmosphere." In Advanced Materials '93, 97–100. Elsevier, 1994. http://dx.doi.org/10.1016/b978-0-444-81993-2.50030-5.

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Conference papers on the topic "Nitrogen Alloying"

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Medres, B., L. Shepeleva, and M. Bamberger. "Laser alloying of titanium alloy with a nitrogen jet." In ICALEO® ‘97: Proceedings of the Laser Applications in the Medical Devices Industry Conference. Laser Institute of America, 1999. http://dx.doi.org/10.2351/1.5059277.

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RAZUMOV, Nikolay, Tagir MAKHMU, Anatoliy POPOVICH, Evgeniy GYULIKHANDANOV, Artem KIM, and Alexey SHAMSHURIN. "MECHANICAL ALLOYING OF HIGH NITROGEN STAINLESS STEEL POWDERS WITH METAL NITRIDES AND NITROGEN-CONTAINING FERROALLOY AS A NITROGEN SOURCE." In METAL 2019. TANGER Ltd., 2019. http://dx.doi.org/10.37904/metal.2019.842.

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Razumov, Nikolay G., Qing Sheng Wang, Anatoly A. Popovich, and Aleksey I. Shamshurin. "Fabrication of spherical high-nitrogen stainless steel powder alloys by mechanical alloying and thermal plasma spheroidization." In INTERNATIONAL SYMPOSIUM ON MATERIAL SCIENCE AND ENGINEERING 2018: ISMSE 2018. Author(s), 2018. http://dx.doi.org/10.1063/1.5030305.

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Maier, Galina, and Valentina Moskvina. "The effect of V-alloying on microstructure peculiarities of high-nitrogen austenitic steels subjected to high-pressure torsion." In PROCEEDINGS OF THE INTERNATIONAL CONFERENCE ON PHYSICAL MESOMECHANICS. MATERIALS WITH MULTILEVEL HIERARCHICAL STRUCTURE AND INTELLIGENT MANUFACTURING TECHNOLOGY. AIP Publishing, 2020. http://dx.doi.org/10.1063/5.0034061.

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Brandt, O., and S. D. Siegmann. "VPS Coatings Using Nanostructural Iron-Based Alloys." In ITSC 1998, edited by Christian Coddet. ASM International, 1998. http://dx.doi.org/10.31399/asm.cp.itsc1998p1249.

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Abstract Thermally sprayed Fe-based coatings could be applied in conditions ranging from almost solid to complete molten droplets. While spraying under atmospheric conditions the oxygen content in the coating alters also in a wide range depending on the spray parameters and the portion of molten phases in droplets (1, 2). Using a Vacuum-Plasma- Spray-System (VPS) Fe-based alloys can be sprayed with high portion of molten phases without oxidation. This fact could be also used for controlled alloying of Fe-based spray materials with nitrogen during as so-called Reactive- Vacuum-Plasma-Spraying (3). The improvement of wear and corrosion resistance of the coatings produced of Febased alloys could be achieved by addition of nitrogen because of the formation of dispersed vanadium-nitride.
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MAKHMUTOV, Tagir, Nikola RAZUMOV, Anatoliy POPOVICH, Evgeniy GYULIKHANDANOV, Artem KIM, and Alexey SHAMSHURIN. "Mechanical properties of high nitrogen 16Cr - 2Ni - Mn - Mo - N stainless steel synthesized by mechanical alloying and spark plasma sintering." In METAL 2019. TANGER Ltd., 2019. http://dx.doi.org/10.37904/metal.2019.844.

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Okatsu, Mitsuhiro, Kenji Oi, Koichi Ihara, and Toshiyuki Hoshino. "High Strength Linepipe With Excellent HAZ Toughness." In ASME 2004 23rd International Conference on Offshore Mechanics and Arctic Engineering. ASMEDC, 2004. http://dx.doi.org/10.1115/omae2004-51143.

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The API 5L-X65 steel plates for low temperature service were produced using the thermo-mechanical control process (TMCP) with the optimum micro-alloying addition. Featuring of the additions are as low amount of titanium, calcium, niobium, and vanadium as possible, for high heat affected zone (HAZ) toughness and strength. Controlling titanium and nitrogen and the Ti/N ratio, a large number of TiN dispersed finely are formed in steel and the austenite grain size near a weld fusion line is refined remarkably owing to strong pinning effect of TiN. Calcium addition promotes ferrite nucleation, so that increase in fine polygonal ferrites makes microstructure of HAZ much finer. Niobium and vanadium content are reduced, because carbide precipitates are formed when the coarse grain HAZ is reheated around 700 degree C and the precipitation hardening deteriorates HAZ toughness. The trial manufacturing of the 19.5mm, 26.9mm and 31.4mm thick X65 grade UOE pipes was finalized with the satisfactory results. The toughness of longitudinal submerged-arc welds was more than 50 J in Charpy V-notch impact test at −30°C.
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Velukkudi Santhanam, Senthil Kumar, Jeffrin Michael Gnana Anbalagan, Shanmuga Sundaram Karibeeran, Dhanashekar Manickam, and Ramaiyan Sankar. "Multi Response Optimization of Friction Stir Processing Parameters on Cryo-Rolled AZ31B Alloys." In ASME 2020 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2020. http://dx.doi.org/10.1115/imece2020-23198.

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Abstract Friction stir processing (FSP) method is a solid-state technique used for microstructural alteration and enhancing mechanical properties of sheet metals and as-cast materials. Aluminium, brass, copper, steel, tin, nickel, magnesium and titanium are the widely used materials in friction stir processing. Even though magnesium has low density compared to aluminium, only few reports are made on magnesium. Two stage of process was carried out on the experiment to obtain fine grain refinement and improved strength. First, Cryo-rolling processing on 6mm thickness AZ31B alloy at constant roller power, roller rotation speed, strength coefficient and strain exponent. AZ31B alloy is dipped in liquid nitrogen for certain period and rolled in it’s cold state. Number of passes into roller was same for 9 samples. Cryo-rolled AZ31B is used as sample for the second stage i.e., Friction stir processing. FSPed material produce refined grain structure, micro-structurally modified cast alloys by alloying specific elements, and improvement in material strength. Based on Process parameters the properties of the material alters. Friction stir processing was performed on cryo-rolled AZ31B magnesium alloy with various processing parameters. The effect of process parameters (tool pin geometry, tool rotational speed and tool traverse speed) on two responses namely ultimate tensile strength and micro-hardness values were measured. The tool used for Friction stir processing is H13 high carbon steel with hardness upto 60 HRC. Tool pin geometry used for Friction stir processing are square, cylinder and tapered. The processed materials are cut using wire cut EDM as per ASTM standards to measure the ultimate tensile strength and hardness. Universal tester and Vickers hardness tester were used to measure the tensile strength and hardness of the Friction stir processed sample. Most of the research has been published on cryo-rolled and FSP experiments separately. In this work, a combination of these two process is developed for improved tensile strength, hardness, and ultrafine grain refinement. A multi-response optimization was performed using grey relation analysis (GRA) to find out the optimum combination of the process parameters for maximum ultimate tensile strength hardness. Analysis of variance (ANOVA) and F-test were performed to determine the most significant parameters at a 95% confidence level. The corrosion test was made on Friction stir processed cryo-rolled AZ31B alloy for every process parameters. Salt spray test was done as per ASTM standard to find the corrosion rate. The corrosion rate for Friction stir processed cryo-rolled material is less (at optimal condition). The microstructure analysis was done on the samples using a Scanning Electron Microscopy. For clear view of grains the material is subjected to polishing and etching. The etchant used on the material is Picral + Acetic acid + Hydrogen peroxide. Fine grain size was obtained on the Friction Stir processed Cryo-rolled AZ31B magnesium alloy at optimal condition.
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