کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7176278 | 1466708 | 2018 | 24 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Microstructure and mechanical properties of laser welded dissimilar joints between QP and boron alloyed martensitic steels
دانلود مقاله + سفارش ترجمه
دانلود مقاله ISI انگلیسی
رایگان برای ایرانیان
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
سایر رشته های مهندسی
مهندسی صنعتی و تولید
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
The newly developed quenching and partitioning (QP) steel QP980 and boron alloyed martensitic steel B1500HS were butt-welded using fiber laser at a constant laser power 4.5â¯kW and various welding speeds of 4â¼10â¯m/min. Retained austenite was measured in the super-critical HAZ of B1500HS (0.9%), inter-critical HAZ of B1500HS (3.4%) and inter-critical HAZ of QP980 (0.6%), while the sub-critical HAZ of QP980 witnessed decomposition of retained austenite from 8.4% to 4.4%. The joints welded at 4â¯m/min achieved the highest tensile strength, while the significantly softened HAZ of the B1500HS was the weakest region. The dissimilar joint welded at 6â¼8â¯m/min fractured at the base metal of QP980, which were preferred as more crash energy can be absorbed. However, the Erichsen values of these welded joints (â¼4.06â¯mm) significantly decreased compared with the base metal of B1500HS (7.46â¯mm) and QP980 steel (8.67â¯mm), as the crack propagated along the softened HAZ of B1500HS.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Materials Processing Technology - Volume 259, September 2018, Pages 58-67
Journal: Journal of Materials Processing Technology - Volume 259, September 2018, Pages 58-67
نویسندگان
Qiang Jia, Wei Guo, Zhandong Wan, Yun Peng, Guisheng Zou, Zhiling Tian, Y. Norman Zhou,