Microstructure and Mechanical Properties of DP980 Laser Welded Blank
In this paper,the result of laser welding of one coated AHSS,DP980,is presented.Optical microscope (OM) and scanning electron microscope (SEM) were used to characterize the weld profile and microstructures.Limited Dome Height (LDH) Testing was performed to evaluate the formability of welded blanks under the biaxial stretching condition with lubrication.Results indicate that the weld exhibits both hardening which are attributed to the high beam quality and its rich chemistry and softening which is caused by the martensite tempering.Finite element (FE) analysis of the LDH testing of laser-welded blanks was carried out using the commercially available software package LS-DYNA.The numerical model including weld properties and geometry can predict the formability behavior accurately.Both experiment and simulation results show that the soft zone is the vulnerable region in LDH testing.
microstructure mechanical properties DP980 Laser welding
LI Guilan ZHANG Hongbo PENG Yun LIU Lixue XIA Mingsheng
R&D Center, Tangshan Iron and Steel Company, Tangshan 063000, Hebei, China Central Iron and Steel Research Institute, Beijing 100081, China
国际会议
成都
英文
590-594
2016-11-16（万方平台首次上网日期，不代表论文的发表时间）