Relevant bibliographies by topics / Warm laser shock peeing

Academic literature on the topic 'Warm laser shock peeing'

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Published: 10 December 2022
Last updated: 29 January 2023

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Journal articles on the topic "Warm laser shock peeing"

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Tani, G., L. Orazi, A. Fortunato, A. Ascari, and G. Campana. "Warm Laser Shock Peening: New developments and process optimization." CIRP Annals 60, no. 1 (2011): 219–22. http://dx.doi.org/10.1016/j.cirp.2011.03.115.

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Liao, Yiliang, Chang Ye, and Gary J. Cheng. "[INVITED] A review: Warm laser shock peening and related laser processing technique." Optics & Laser Technology 78 (April 2016): 15–24. http://dx.doi.org/10.1016/j.optlastec.2015.09.014.

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Lu, Ying, Yuling Yang, Jibin Zhao, Yuqi Yang, Hongchao Qiao, Xianliang Hu, Jiajun Wu, and Boyu Sun. "Impact on Mechanical Properties and Microstructural Response of Nickel-Based Superalloy GH4169 Subjected to Warm Laser Shock Peening." Materials 13, no. 22 (November 16, 2020): 5172. http://dx.doi.org/10.3390/ma13225172.

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Laser shock peening (LSP), as an innovative surface treatment technology, can effectively improve fatigue life, surface hardness, corrosion resistance, and residual compressive stress. Compared with laser shock peening, warm laser shock peening (WLSP) is a newer surface treatment technology used to improve materials’ surface performances, which takes advantage of thermal mechanical effects on stress strengthening and microstructure strengthening, resulting in a more stable distribution of residual compressive stress under the heating and cyclic loading process. In this paper, the microstructure of the GH4169 nickel superalloy processed by WLSP technology with different laser parameters was investigated. The proliferation and tangling of dislocations in GH4169 were observed, and the dislocation density increased after WLSP treatment. The influences of different treatments by LSP and WLSP on the microhardness distribution of the surface and along the cross-sectional depth were investigated. The microstructure evolution of the GH4169 alloy being shocked with WLSP was studied by TEM. The effect of temperature on the stability of the high-temperature microstructure and properties of the GH4169 alloy shocked by WLSP was investigated.
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Su, Chun, Jianzhong Zhou, Xiankai Meng, and Jie Sheng. "Comparison of warm laser shock peening and laser shock peening techniques in lengthening the fatigue life of welded joints made of aluminum alloy." International Journal of Modern Physics B 31, no. 16-19 (July 26, 2017): 1744045. http://dx.doi.org/10.1142/s0217979217440453.

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Welded joints made of 6061-T6 Al alloy were studied to evaluate warm laser shock peening (WLSP) and laser shock peening (LSP) processes. The estimation model of laser-induced surface residual stress was examined by means of experiments and numerical analysis. The high-cycle fatigue lives of welded joint specimens treated with WLSP and LSP were estimated by conducting tensile fatigue tests. The fatigue fracture mechanisms of these specimens are studied by surface integrity and fracture surface tests. Experimental results and analysis indicated that the fatigue life of the specimens processed by WLSP was higher than that with LSP. The large increase in fatigue life appeared to be the result of the larger residual stress, more uniform microstructure refinement and the lower surface roughness of the WLSP specimens.
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Altenberger, I. "Alternative Mechanical Surface Treatments for Fatigue Strength Enhancement." Materials Science Forum 490-491 (July 2005): 328–33. http://dx.doi.org/10.4028/www.scientific.net/msf.490-491.328.

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In this paper, The effects of laser-shock peening and high temperature deep rolling on nearsurface microstructures, residual stress states and fatigue behavior of various metallic materials are investigated and discussed. Similar to warm peening (shot peening at elevated temperatures), high temperature deep rolling may induce several favourable effects, especially in ferritic steels, where dynamic strain aging by carbon atoms can be exploited as a major strengthening mechanism. But also in materials without ‚classical‘ strain aging high temperature deep rolling is effective in improving the fatigue behaviour by inducing favourable, e.g. precipitation-hardened, nearsurface microstructures. As a consequence, these modified near-surface microstructures directly alter the thermal and mechanical relaxation behaviour of residual stresses. Laser-shock peening is already used in the aircraft industry (as a mechanical surface treatment for fan-blades) and owes its benefial effects to deep layers of compressive residual stress and work hardening and a relatively smooth surface roughness. Characteristic examples of microstructures and residual stress profiles as generated by laser-shock peening are presented. Moreover, the impact on the fatigue behavior of steels and a titanium alloy is outlined and discussed.
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Liao, Yiliang, Chang Ye, Bong-Joong Kim, Sergey Suslov, Eric A. Stach, and Gary J. Cheng. "Nucleation of highly dense nanoscale precipitates based on warm laser shock peening." Journal of Applied Physics 108, no. 6 (September 15, 2010): 063518. http://dx.doi.org/10.1063/1.3481858.

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Zhang Qinglai, 张青来, 张乔 Zhang Qiao, 张冰昕 Zhang Bingxin, 李兴成 Li Xingcheng, and 刘惠 Liu Hui. "Study on Characteristic of Warm Laser Shock Peening of AZ80-T6 Magnesium Alloy." Chinese Journal of Lasers 42, no. 10 (2015): 1006002. http://dx.doi.org/10.3788/cjl201542.1006002.

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Hu, Taiyou, Songxia Li, Hongchao Qiao, Ying Lu, Boyu Sun, and Jiajun Wu. "Effect of Warm Laser Shock Peening on Microstructure and Properties of GH4169 Superalloy." IOP Conference Series: Materials Science and Engineering 423 (November 6, 2018): 012054. http://dx.doi.org/10.1088/1757-899x/423/1/012054.

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Zhang Qinglai, 张青来, 刘惠 Liu Hui, 张冰昕 Zhang Bingxin, 李兴成 Li Xingcheng, 王荣 Wang Rong, and 邵伟 Shao Wei. "Warm Laser Shock Peening and Low Cycle Fatigue Behavior of Extruded AZ80-T6 Magnesium Alloy." Chinese Journal of Lasers 42, no. 11 (2015): 1103004. http://dx.doi.org/10.3788/cjl201542.1103004.

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Lu, Ying, Jibin Zhao, Hongchao Qiao, Taiyou Hu, Boyu Sun, and Jiajun Wu. "A study on the surface morphology evolution of the GH4619 using warm laser shock peening." AIP Advances 9, no. 8 (August 2019): 085030. http://dx.doi.org/10.1063/1.5082755.

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Dissertations / Theses on the topic "Warm laser shock peeing"

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Bolis, Riccardo Maria. "Investigations of high pressure phase diagrams of MgO-SiO2 systems with laser shock compression." Thesis, Université Paris-Saclay (ComUE), 2017. http://www.theses.fr/2017SACLX056/document.

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La découverte récente d’un grand nombre d’exoplanètes et en particulier des planètes potentiellement habitables suscite une grande fascination. Pour modéliser les intérieurs de ces planètes, il est crucial de connaître avec précision les propriétés physiques et les équations d’état des composants planétaires. Ces matériaux se trouvent à des conditions de pressions et températures extrêmes ( 1-100 Mbar, 10^3-10^4 K), correspondantes à celles de la matière dense et tiède ou Warm Dense Matter (WDM). La description théorique de cette matière a progressé grâce aux calculs ab initio, mais reste complexe. Les données expérimentales sont fondamentales dans ce contexte.Ce projet de thèse porte sur l’étude expérimentale de trois matériaux importants pour la géophysique, le MgO, MgSiO3 et Mg2SiO4 dans le domaine ≈ 0.5-10 Mbar. Ces trois matériaux en fait sont les pôles purs magnésiens du (Fe, Mg)SiO3 and (Fe, Mg)2SiO4 qui sont parmi les composantes plus abondantes du manteau terrestre et très probablement des manteaux du Super-Terres et des noyaux des planètes géantes. Pour amener ces matériaux aux conditions typiques des intérieurs planétaires on a utilisé la technique de chocs laser. En particulier, nous avons réalisé trois campagnes expérimentales sur des grandes installations: LULI2000 (Ecole Polytechnique, France), GEKKOXII (Osaka University, Japan), MEC à LCLS (SLAC, USA). Pour chaque campagne, on a utilisé une technique différente. Sur LULI2000 et GEKKOXII nous avons étudié les propriétés de MgO, MgSiO3 et Mg2SiO4 liquide et la fusion avec des chocs décroissants couplés avec des diagnostiques optiques. Sur LULI2000 on a étudié les propriétés électroniques et structurelles du MgO liquide avec la spectroscopie XANES. Sur MEC, on a conduit une expérience de diffraction X pour déterminer les changements structuraux induits par des chocs stationnaires dans le régime solide sur le MgSiO3 et le Mg2SiO4. Dans leur ensemble, les résultats de ces expériences impliquent une révision des diagrammes de phase des matériaux étudiés. En particulier, on a déterminé un nouveau point de fusion pour le MgO (à 470 ± 40 GPa et 9860 ± 810 K), on a résolu une controverse sur la présence d’une transformation liquide-liquide dans le diagramme de phase du MgSiO3 (qui concernait une région autour de ~ 400 GPa sur la Hugoniot) et on a obtenu pour la première fois des évidences de la amorphisation de la Forsterite (Mg2SiO4 cristal) sous choc (à ~ 50 GPa sur la Hugoniot). En plus on a obtenu des informations sur la réflectivité (liée à la conductivité) pour le trois matériaux, et les données de spectroscopie XANES ont permis de comprendre le mécanisme de fermeture du gap (métallisation) du MgO sous effet de la température
Two decades of exoplanet discoveries brought the physics of planetary interiors among the topics of broad and current interests. To advance in this field, one of the key ingredient is the knowledge of the equation of states and physical properties of planetary constituents. At the extreme conditions of planetary interiors ( 1-100 Mbar, 10^3-10^4 K), matter lies in the Warm Dense Matter (WDM) regime and theoretical descriptions are not trivial. Important progress have been done with ab-initio calculations based on differential functional theories, but such calculations need to be validated by experiments.In this thesis, we experimentally characterized phase diagrams and physical properties of MgO, MgSiO3 and Mg2SiO4 at conditions relevant for planetary science (0.5-10 Mbar). The studied compounds are the Mg end members of (Fe, Mg)SiO3 and (Fe, Mg)2SiO4 that are among the most abundant components of Earth’s mantle and are also thought to be abundant in Super-Earth’s mantle and giant planet cores. To bring these materials to planetary interior conditions we performed laser shock compression experiments at three high power laser facilities: LULI2000 (France), GEKKOXII (Japan), MEC at LCLS(USA). At LULI2000 and GEKKOXII we investigated the liquid properties and melting of MgO, MgSiO3 and Mg2SiO4 using decaying shocks coupled to visible diagnostics. At LULI2000 we studied with XANES spectroscopy MgO in the WDM regime highlighting its metallisation mechanism and structural properties in the liquid phase. Finally, at the MEC end station of LCLS, we used X-ray diffraction to measure shock induced structural changes on MgSiO3 and Mg2SiO4 in the solid region of their phase diagrams. Altogether these works, obtained with different diagnostics, imply a revision of the phase diagrams of the studied compounds. In particular we determined a new experimental melting point for MgO (at 470 ± 40 GPa and 9860 ± 810 K), we ruled out the occurrence of an MgSiO3 liquid-liquid transition (supposed to occur at ~ 400 GPa along the Hugoniot) and we evidenced for the first time the occurrence of an amorphous phase along the Forsterite (Mg2SiO4 crystal) Hugoniot (at ~50 GPa)
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Guarguaglini, Marco. "Laser-driven shock compression of liquid mixtures and silica up to extreme thermodynamic conditions of interest for planetary interior models." Thesis, Université Paris-Saclay (ComUE), 2019. http://www.theses.fr/2019SACLX075/document.

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L’étude du comportement des composantes des intérieurs planétaires dans des conditions extrêmes de pression (megabar) et température (milliers de Kelvin) est essentielle afin de construire des modèles fiables décrivant l’évolution et la structure des planètes. Dans ce travail, nous avons étudié plusieurs composantes par compression par choc laser sur les installations LULI2000 (France) et GEKKO XII (Japon).Nous avons employé des chocs décroissants pour étudier des conditions de haute-pression / haute-température. Afin d’accéder à des conditions de température modérée, nous avons utilisé des techniques de pre-compression statique (couplage compression par choc — cellules à enclumes de diamant) et dynamique (génération de doubles chocs).Nous avons étudié l’équation d’état des mélanges eau-ethanol-ammoniac et de l’eau et ammoniac purs, d’intérêt pour la description des intérieurs des planètes géantes de glace. L’étude de l’ammoniac a été particulièrement délicate en raison de sa forte réactivité et donc de la complexité du design des cibles ; nous présentons les premières données obtenues par choc laser, dans un domaine de pression jamais exploré. Les données des mélanges confirment des calculs ab initio récents basés sur une approximation de mélange linéaire.Nous avons également mesuré la réflectivité des mélanges liquides et de la silice, une composante-clé des intérieurs des planètes terrestres. Nous avons ensuite estimé la conductivité électrique — un paramètre crucial pour modéliser la génération des champs magnétiques planétaires dans les intérieurs via un mécanisme dynamo — de ces composantes.Eau, ammoniac et mélanges eau-ethanol-ammoniac affichent des réflectivités différentes, ce qui suggère que l’eau pure ne peut pas être considérée comme représentative des mélanges planétaires dans les modèles dynamo.Par ailleurs, nous avons apporté une confirmation expérimentale de calculs ab initio récents selon lesquels la conductivité de la silice n’est pas monotone le long d’une ligne isotherme pour des températures modérées.Nos données supportent des calculs qui prédisent qu’une dynamo peut avoir lieu dans les océans de magma dans des super-Terres ainsi que dans la jeune Terre
Characterising the behaviour of planetary interiors’ components at extreme conditions (megabar pressures, temperatures of a few thousand Kelvin) is essential to build reliable models describing the evolution and structure of planets. In this thesis, we investigated various components on a wide set of conditions using laser-driven shock compression techniques at the LULI2000 (France) and GEKKO XII (Japan) facilities.Single decaying shocks were employed to study high-pressure / high-temperature states. To reach moderate-temperature conditions, closer to planetary interior profiles, we employed static and dynamic pre-compression techniques coupling Diamond Anvil Cells to shock compression and generating double shocks, respectively.We studied the equation of state of water-ethanol-ammonia mixtures and of pure liquid water and ammonia, of interest for icy giant structure models. Pure ammonia measurements have been particularly challenging due to cell design complexity in reason of its reactivity; we provide the first data obtained with laser shocks, in a pressure domain up to now unexplored. Mixtures data are in agreement with recent ab initio calculations based on the linear mixing approximation.We measured the optical reflectivity of liquid mixtures and silica, a key component of rocky planets’ interiors. From reflectivity data we estimated the electrical conductivity of such components — a crucial parameter for modelling the generation of planetary magnetic fields in the interiors via a dynamo mechanism.Water, ammonia, and water-ethanol-ammonia mixtures exhibit different reflectivity (hence conductivity) behaviours as a function of pressure and temperature. This suggests that pure water should not be used in dynamo models as representative of the icy mixtures.Moreover, we provide the first experimental confirmation of recent ab initio studies showing that the conductivity of silica along isothermal lines is not monotonic at moderate temperatures. Our data provide experimental support for the calculations predicting a dynamo action to occur in super-Earths’ and early Earth’s magma oceans
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(6417158), Gaurav Vilas Inamke. "THE INVESTIGATION OF WARM LASER SHOCK PEENING AS A POST PROCESSING TECHNIQUE TO IMPROVE JOINT STRENGTH OF LASER WELDED MATERIALS." Thesis, 2019.

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This study is concerned with investigating the effects of warm laser shock peening (wLSP) on the enhancement of mechanical performance of laser welded joints. A 3-D finite element model is presented which predicts the surface indentation geometry and in-depth compressive residual stresses generated by wLSP. To define the LSP pressure on the surface of the material, a 1-D confined plasma model is implemented to predict plasma pressure generated by laser-coating interaction in an oil confinement regime. Residual stresses predicted by the finite element model for wLSP reveal higher magnitude and depth of compressive residual stresses than room temperature laser shock peening. A novel dual laser wLSP experimental setup is developed for simultaneous heating of the sample, to a prescribed temperature, and to perform wLSP. The heating laser power is tuned to achieve a predefined temperature in the material through predictive analysis with a 3-D transient laser heating model.

Laser welded joints of AA6061-T6 and TZM alloy in bead-on-plate (BOP) and overlap configurations, created by laser welding with a high power fiber laser, were post processed with wLSP. To evaluate the strength of the welded joints pre- and post-processing, tensile testing and tensile-shear testing were carried out. To understand the failure modes in tensile-shear testing of the samples, a 3-D finite element model of the welded joint was developed with weld regions’ material strength properties defined through microhardness testing. The stress concentration regions predicted by the finite element model clearly explain the failure regions in the experimental tensile testing analysis. The tensile tests and tensile-shear tests carried out on wLSP processed AA6061-T6 samples demonstrate an enhancement in the joint strength by about 20% and ductility improvement of about 33% over as-welded samples. The BOP welds of TZM alloy processed with wLSP demonstrated an enhancement in strength by about 30% and lap welds demonstrated an increase in joint strength by 22%.

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Book chapters on the topic "Warm laser shock peeing"

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Tomar, Krishnpal Singh, Anshu Sahu, Ashish Shukla, and I. A. Palani. "Effect of Laser Shock Peening of WAAM Deposited Ni–Ti Shape Memory Alloy on the Mechanical Property." In Lecture Notes in Mechanical Engineering, 725–32. Singapore: Springer Nature Singapore, 2022. http://dx.doi.org/10.1007/978-981-19-0244-4_68.

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Conference papers on the topic "Warm laser shock peeing"

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Fortunato, Alessandro, Leonardo Orazi, Gabriele Cuccolini, and Alessandro Ascari. "Laser shock peening and warm laser shock peening: process modeling and pulse shape influence." In SPIE LASE, edited by Friedhelm Dorsch. SPIE, 2013. http://dx.doi.org/10.1117/12.2007393.

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Yang, Yuqi, Jibin Zhao, Hongchao Qiao, Jiajun Wun, and Xianliang Hu. "The research progress on strengthen property and mechanism of warm laser shock peening." In 24th National Laser Conference & Fifteenth National Conference on Laser Technology and Optoelectronics, edited by Yue Yang, Jianqiang Zhu, Weibiao Chen, Pu Wang, Jianrong Qiu, Zhenxi Zhang, and Minlin Zhong. SPIE, 2020. http://dx.doi.org/10.1117/12.2584353.

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Ye, Chang, and Gary J. Cheng. "Fatigue Performance Improvement by Dynamic Strain Aging and Dynamic Precipitation in Warm Laser Shock Peening of AISI 4140 Steel." In ASME 2010 International Manufacturing Science and Engineering Conference. ASMEDC, 2010. http://dx.doi.org/10.1115/msec2010-34301.

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Warm laser shock peening (WLSP) integrates the advantages of laser shock peening and thermal-mechanical treatment (TMT) to improve material fatigue performance. Compared to traditional laser shock peening (LSP), warm laser shock peening, i.e. LSP at elevated temperature, leads to better performance in many aspects. WLSP can induce nanoscale precipitations by dynamic precipitation and high density dislocation by dynamic strain aging (DSA), resulting in higher surface strength, which is beneficial for fatigue life improvement. Due to pinning of dislocation structure by nanoscale precipitates, and the pinning of dislocation structure by Cottrell atmosphere, or the DSA effect, stability of the dislocation arrangement is significantly increased and the residual stress stability improved. In this study, AISI 4140 steel is used to evaluate WLSP process. It is concluded that the higher residual stress stability and higher surface strength caused by dynamic precipitation and DSA in WLSP leads to fatigue life improvement.
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Liao, Yiliang, Chang Ye, and Gary J. Cheng. "Nucleation of Highly Dense Nanoscale Precipitates Based on an Innovative Process: Warm Laser Shock Peening." In ASME 2010 International Manufacturing Science and Engineering Conference. ASMEDC, 2010. http://dx.doi.org/10.1115/msec2010-34297.

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Warm laser shock peening (WLSP) is an innovative thermo-mechanical processing technique, which combines the advantages of laser shock peening (LSP) and dynamic aging (DA). It has been found that a unique microstructure with highly dense nanoscale precipitates surrounded by dense dislocation structures is generated by WLSP. In order to understand the nucleation mechanism of the highly dense precipitates during WLSP, aluminum alloy 6061 (AA6061) has been used by investigating the WLSP process with experiments and analytical modeling. An analytical model has been proposed to estimate the nucleation rate in metallic materials after WLSP. The effects of the processing temperature and high strain rate deformation on the activation energy of nucleation have been considered in this model. This model is based on the assumption that dynamic aging during WLSP can be assisted by the dense dislocation structures and warm temperature. The effects of the working temperature and dislocation density on the activation energy of precipitation have been investigated. This model is validated by a series of experiments and characterizations after WLSP. The relationships between the processing conditions, the nucleation density of precipitates and the defect density have been investigated.
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Ye, Chang, Dong Lin, Yiliang Liao, and Gary J. Cheng. "Effect of Warm Laser Shock Peening on the Tensile Strength and Ductility of Aluminum Alloys." In ASME 2012 International Manufacturing Science and Engineering Conference collocated with the 40th North American Manufacturing Research Conference and in participation with the International Conference on Tribology Materials and Processing. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/msec2012-7371.

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In this study, aluminum alloy 7075 (AA 7075) is processed by WLSP and compared with LSP at room temperature (RT-LSP). The microstructure of AA 7075 after processing is characterized by transmission electron microscopy (TEM) and X-ray diffraction (XRD). Tensile test and hardness test were carried out to investigate the effect of WLSP to material strength and ductility. It has been found that highly dense nanoscale precipitate particles are generated after WLSP. These nanoscale precipitate particles effectively block dislocations and thus increase the material strength.
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Inogamov, N. A., V. V. Zhakhovsky, and V. A. Khokhlov. "Warm dense matter in extremely small volume - Hydrodynamics of nanofilms triggered by laser irradiation at diffraction limit." In SHOCK COMPRESSION OF CONDENSED MATTER - 2017: Proceedings of the Conference of the American Physical Society Topical Group on Shock Compression of Condensed Matter. Author(s), 2018. http://dx.doi.org/10.1063/1.5045044.

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