Thickness Analysis of Two-Sided Simultaneous Laser Shock Processing on AM50 Mg Alloy

Kaiyu, 罗开玉 Luo; Qi, 陈起 Chen; Ci, 吕刺 Lü; Juan, 刘娟 Liu; Tong, 林通 Lin

doi:10.3788/cjl201441.0103003

Cited by 1 publication

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“…Some scholars have studied to improve effect of the thin-walled part LSP. For example, residual stress fields of all AM50 Mg alloy sheets with different thicknesses treated by two-sided simultaneous LSP are simulated using ABAQUS software 7 . However, the author didn't conduct the relevant experimental verification, and two-sided simultaneous LSP is easy to generate residual tensile stress and microcracks in the middle of thin-wall workpieces which is harmful to fatigue.…”

Section: Introductionmentioning

confidence: 99%

Experimental investigation of laser shock peening on TC17 titanium alloy for thin-wall workpieces

Sun¹,

Qiao²,

Zhao³

et al. 2018

Tenth International Conference on Information Optics and Photonics

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To study the performance and microstructure of TC17 thin-walled parts in shock wave and its reflection wave induced by laser, TC17 titanium alloy samples are processed using YAG laser with the wavelength of 1064 nm, pulse energy of 7J and pulse width of 15ns. Thus, its residual stress, microhardness and microstructure of overlapping shock with different thickness are obtained. The results show that with the thickness increasing, the front micro-hardness increases, and the reverse micro-hardness increases firstly and then decreases. The variation of residual stress with the thickness is consistent with the micro-hardness. The front residual stress maximum reaches-496.5MPa at the thickness of 5mm, and the reverse residual stress maximum reaches-171.1MPa at the thickness of 2mm. With the increase of thickness, the distribution of surface dislocations is more uniform, the grain refinement effect is more obvious, and the strengthening effect is the better. The causes of the variation of the double-sided residual stress field with the thickness are explained by theoretical analysis of the propagation and reflection of the shock wave in the material. The conclusions of this investigation have significance for the optimization of laser shock peening thin-wall workpieces.

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Section: Introductionmentioning

confidence: 99%