TY - JOUR
T1 - The influence of induction pre-heating on microstructure and mechanical properties of S690QL steel joints by laser welding
AU - Li, Li
AU - Mi, Gaoyang
AU - Zhang, Xiong
AU - Xiong, Lingda
AU - Zhu, Zhengwu
AU - Wang, Chunming
N1 - Publisher Copyright:
© 2019 Elsevier Ltd
PY - 2019/11
Y1 - 2019/11
N2 - With extensive application prospect, the laser-induction hybrid welding (LIHW) has become a research hotpot recently. In this paper, joining of the high strength low alloy (HSLA) steel S690QL by using LIHW and single-laser welding (SLW) was studied and compared. Microstructure and mechanical properties of S690QL welded joints produced were investigated using scanning electron microscope (SEM), electrical back-scattered diffraction (EBSD) and mechanical testing. The results indicated that, due to the induction pre-heating (IPH), microstructure of LIHW joints exhibited better interface integrity. Compared LIHW with SLW, IPH apparently increased heat input and extended cooling time, which inhibited the formation of defects and martensite. Consequently, the ferrite turned to be the predominant phase of the weld, resulting in the decrease of microhardness, and the improvement of plasticity.
AB - With extensive application prospect, the laser-induction hybrid welding (LIHW) has become a research hotpot recently. In this paper, joining of the high strength low alloy (HSLA) steel S690QL by using LIHW and single-laser welding (SLW) was studied and compared. Microstructure and mechanical properties of S690QL welded joints produced were investigated using scanning electron microscope (SEM), electrical back-scattered diffraction (EBSD) and mechanical testing. The results indicated that, due to the induction pre-heating (IPH), microstructure of LIHW joints exhibited better interface integrity. Compared LIHW with SLW, IPH apparently increased heat input and extended cooling time, which inhibited the formation of defects and martensite. Consequently, the ferrite turned to be the predominant phase of the weld, resulting in the decrease of microhardness, and the improvement of plasticity.
KW - Laser-induction hybrid welding
KW - Mechanical property
KW - Microstructure
KW - S690QL
KW - Single-laser welding
UR - https://www.scopus.com/pages/publications/85066083907
U2 - 10.1016/j.optlastec.2019.105606
DO - 10.1016/j.optlastec.2019.105606
M3 - Article
AN - SCOPUS:85066083907
SN - 0030-3992
VL - 119
JO - Optics and Laser Technology
JF - Optics and Laser Technology
M1 - 105606
ER -