Evaluate the effect of laser shock peening on plasticity of Zr-based bulk metallic glass》.pdf

Optics Laser Technology 73 (2015) 94–100 Contents lists available at ScienceDirect Optics Laser Technology journal homepage: /locate/optlastec Evaluate the effect of laser shock peening on plasticity of Zr-based bulk metallic glass Jie Fu, Yunhu Zhu, Chao Zheng, Ren Liu, Zhong Ji n Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials (MOE), School of Materials Science and Engineering, Shandong University, 17923 Jingshi Road, Jinan 250061, PR China a r t i c l e i n f o a b s t r a c t Article history: The effect of laser shock peening (LSP) on mechanical properties, especially the plasticity of a typical Zr- Received 5 February 2015 based bulk metallic glass (BMG) had been investigated. The surface treatment introduced by successive Received in revised form laser pulses facilitated the formation of shear bands and promoted the plastic deformation of BMG. 27 March 2015 Experimental investigations of the bending deformation behavior were performed by three-point Accepted 10 April 2015 bending test at room temperature. It was found that the LSP pretreatment could improve the plasticity. Available online 14 May 2015 The shear bands in fracture surface of laser peened sample were increased which could be observed by Keywords: SEM. Logarithmic strain and stress distributions during bending def