Inter-pass temperature effect on residual stress in multi-pass welding high strength low alloy steel
- سال انتشار: 1397
- محل انتشار: ششمین کنفرانس بین المللی متالورژی پودر
- کد COI اختصاصی: PMAUTO06_092
- زبان مقاله: انگلیسی
- تعداد مشاهده: 397
نویسندگان
Master of marine engineering, Amirkabir University of Technology, Tehran, IRAN
Assistant professor, Amirkabir University of Technology, Tehran, IRAN
چکیده
Welding one of the manufacturing processes used to make connections. Due to the high temperature of the welding and the non-uniform heat distribution, thermal stresses are created in the piece, which, after cooling the unit, are converted into residual stresses. Residual stress causes distortion, cracking, loss of buckling and failure strength, which generally affects the function and the life-time of the structure.Using the multi-pass and multilayer welding method, the heat required for welding is stepwise and timed to the piece, which can be prevented from entering the heat at once, and by controlling the inter-pass temperatures, the residual stress is reduced. In this research, multi-pass welding of high-strength low-alloy steel (DH36) plates using a numerical method with the help of ANSYS software has been investigated. This analysis was performed in three dimensions using the elemental birth and death technique. Two welding methods with gas metal arc welding are considered for the first two layers of the weld and submerged arc welding for the last three layers.Three different modes have been considered for inter-pass temperature values, each of which has been studied on the magnitude and distribution of residual stress. The results show that increasing the inter-pass temperature reduces the maximum magnitude of residual stress and also increases the distribution area of residual stress in the area of maximum residual stress.کلیدواژه ها
Welding, Multi-pass Welding, Residual Stress, Inter-pass Temperatureمقالات مرتبط جدید
اطلاعات بیشتر در مورد COI
COI مخفف عبارت CIVILICA Object Identifier به معنی شناسه سیویلیکا برای اسناد است. COI کدی است که مطابق محل انتشار، به مقالات کنفرانسها و ژورنالهای داخل کشور به هنگام نمایه سازی بر روی پایگاه استنادی سیویلیکا اختصاص می یابد.
کد COI به مفهوم کد ملی اسناد نمایه شده در سیویلیکا است و کدی یکتا و ثابت است و به همین دلیل همواره قابلیت استناد و پیگیری دارد.