Study on laser shock forming and fracture behavior of metal sheet

作者：Zhang Qinglai^*; Wang Rong; Hong Yanxin; Wu Tiedan; Qian Yang; Zhang Yongkang

来源：Chinese Journal of Lasers, 2014, 41(4): 0403010.

DOI：10.3788/CJL201441.0403010

• AZ31 alloy
• Ductile and brittle fractures
• Fracture behavior
• Fracture pattern
• High strain rates
• Laser shock forming
• Sheet anisotropy
• Thickness thinning

The cross-rolled AZ31 sheet and the cold-rolled molybdenum strip are shocked by the Thales Laser with the maximum output pulse energy of 12.5 J. Properties of these two laser shock forming (LSF) are compared and then fracture behavior and microstructure are analyzed and discussed. The results show that cold forming of AZ31 sheet and molybdenum strip with high strain rate is realized after continuously repeat laser shock under different energy densities. The LSF fracture behavior of AZ31 sheet and molybdenum strip both perform thickness thinning while a spallation phenomenon is observed during LSF of molybdenum strip. The fracture of AZ31 sheet is a mixture of ductile and brittle fracture, while that of molybdenum strip is the brittle fracture. In addition, the effect of these two metal sheet anisotropy and strain rate on the LSF formability with high energy, high strain rate and fracture behavior is discussed.

• 出版日期2014
• 单位东南大学