Effect of Laser Shock Strengthening on Fatigue Behaviors of 2A02 Aluminum Alloy

Xinmin, 罗新民 Luo; Jingwen, 张静文 Zhang; Guangzhi, 赵广志 Zhao; Xudong, 任旭东 Ren; Yongkang, 张永康 Zhang

doi:10.3788/cjl20093612.3323

Cited by 5 publications

(3 citation statements)

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“…And 7075 Aluminum alloys and TC4 titanium alloys by laser peening has been reported [11] . With all of that investigate of laser peening that we know that the new technique induced beneficial microstructural changes on the material surface and sub-surface [12] , which improved component fatigue performance and other performence [13] . However, there were few reports concern the effects of laser peening on microstructure and properties of TiAl alloy in the literature to date [14] .…”

Section: Introductionmentioning

confidence: 99%

Study of Laser Peening on TiAl Alloy Properties with Different Parameters

Qiao

2015

AMR

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Laser peening is a novel surface treatment process that generates deep compressive residual stresses and microstructural changes and thereby dramatically improves fatigue strength of critical metal aircraft engine parts. In order to study the effects of laser peening on properties of TiAl alloy, Surface micro-hardness, microstructural, residual stress and pole figures before and after laser peening were tested. The experimental results showed that surface micro-hardness increased by 23%. The compressive residual stress increased 20 times. The texture in the normal direction of 8J peened sample showed a strong fiber texture components 10º away. In conclusion, the laser peening could improve properties of TiAl alloy.

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Section: Introductionmentioning

confidence: 99%

Study of Laser Peening on TiAl Alloy Properties with Different Parameters

Qiao

2015

AMR

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“…Microscale laser shot peening (µ LSP) technology to solve the above problem provides a new way. Microscale laser shot peening (µ LSP) technology to solve the micro-structure of the modified surface to prolong life provides a new method, it is in the laser shot peening developed on the basis of, use high repeat rate of short pulse laser beam and material interaction of pressure wave induced surface modification of technology, by strengthening the role [8] and moderate residual stress distribution, can greatly improve the mechanical properties of the micro components [9,10] , so as to improve the structure reliability, the difference is energy for yellow hair to the focal range; the flare for sub-micrometer range.…”

Section: Introductionmentioning

confidence: 99%

Based on Microscale Laser Shock Processing of Metal Material Characteristics Analysis and Prospect

Wang

Zhu

Xie

et al. 2012

AMR

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It is introduced that laser shock peening is suitable for machining metal micro components. The micro scale effect and elastic-plastic theory of micro scale laser shock processing were analyzed and discussed. The research status, mechanism, key technology and influence factors of microscale lager shock peening were summarized and the problems in microscale lager shock peening were analyzed, which provides guidance for further research.

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“…Short pulses (10~30ns) and high peak power density (10 9 W/cm 2 ) laser are used to irradiate on metal surfaces, the surface coating absorbs the laser energy, and explosive and evaporation, resulting in high pressure (GPa level) plasma shock wave, which acts on the metal surface and transfers to the internal material [6] . When the peak pressure of the shock wave exceeds the dynamic yield strength of the processed materials, the strain hardening occurs on the material surface, and results in larger compressive residual stress, while some changes happens in its micro-structures, that significantly improves the material fatigue resistance, wear, stress corrosion, and etc [7][8] . Laser shock wave was used to strengthen the surface of QT800 materials in this paper, the effects of shock processing on fatigue properties of QT800 for the crankshaft was analyzed with fatigue test, that provides a theoretical basis for enhanced treatment.…”

Section: Introductionmentioning

confidence: 99%

Research on Fatigue Behaviors of Nodular Cast Iron QT800 by Laser Shock Processing

Wang

2010

AMR

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The surface of nodular cast iron QT800 was processed with LSP, its micro-structures, residual stress and fatigue test were compared before and after LSP, and the rupture morphologies of fatigue test were analyzed, the effects of LSP on fatigue behavior of QT800 were discussed. The results shown that the compressive residual stress of QT800 by LSP is over 400MPa, and its fatigue life is increased 20% than that in primitive state; the fatigue resource or the sample by LSP is produced near the graphite, compressive residual stress and refined grain effectively delays cracks initiation of the fatigue source, the expansion speed of fatigue cracks is decreased, which increases fatigue life of QT800.

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Effect of Laser Shock Strengthening on Fatigue Behaviors of 2A02 Aluminum Alloy

Cited by 5 publications

References 0 publications

Study of Laser Peening on TiAl Alloy Properties with Different Parameters

Study of Laser Peening on TiAl Alloy Properties with Different Parameters

Based on Microscale Laser Shock Processing of Metal Material Characteristics Analysis and Prospect

Research on Fatigue Behaviors of Nodular Cast Iron QT800 by Laser Shock Processing

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