کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1581736 1514866 2008 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Residual strains and microstructure development in single and sequential double sided friction stir welds in RQT-701 steel
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد دانش مواد (عمومی)
پیش نمایش صفحه اول مقاله
Residual strains and microstructure development in single and sequential double sided friction stir welds in RQT-701 steel
چکیده انگلیسی

Single and double sided partial penetration friction stir butt welds, in a rolled, quenched and tempered steel (RQT-701), were produced at The Welding Institute (TWI) under controlled process conditions. The residual strain distributions in the longitudinal and transverse directions have been measured using energy dispersive synchrotron X-ray diffraction. The measured strains were indicative of longitudinal tensile residual stresses at levels greater than the 0.2% yield stress of the parent metal in both the single and double pass welds. In both cases, the maximum tensile strain was found in the parent metal at the boundary of the heat affected zone (HAZ). Microstructural analysis of the welds was carried out using optical microscopy and hardness variations were also mapped across the weld-plate cross-section. The maximum hardness was observed in the mixed bainite/martensite structure of the weld nugget on the advancing side of the stir zone. The minimum hardness was observed in the HAZ.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Science and Engineering: A - Volume 492, Issues 1–2, 25 September 2008, Pages 35–44
نویسندگان
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