کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7975326 | 1514675 | 2016 | 14 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Effect of weld metal toughness on fracture behavior under ultra-low cycle fatigue loading (earthquake)
ترجمه فارسی عنوان
اثر سختی فلز جوش بر رفتار شکستگی در بارگیری خستگی چرخه فوق العاده کم (زلزله)
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کلمات کلیدی
فلز جوش، خستگی چرخه فوق العاده کم، سختی، ریز ساختار،
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
دانش مواد (عمومی)
چکیده انگلیسی
Results from 12 ultra-low cycle fatigue tests performed on the weld metals of both toughness and non-toughness rated grades are presented. Fracture resistance under these loadings seemed to be dependent on materials' toughness, displacement amplitude, and stress state triaxiality, while the toughness effect was more highlighted at high stress levels and concentrations. To study the effect of microstructures on these failures, supporting ancillary tests including all-weld tension coupons, Charpy V-notched impact tests, and optical and scanning electron microscope analyses were performed. The favored microstructures appeared to be those which absorbed energy by plastic deformation and, hence, hindered void formation and/or could avoid crack propagation by deflection. Considering the response of the tested materials to cyclic loadings and the requirements of the materials specified in AISC341 Provisions could question the adequacy of these requirements for weld metals. However, the role of microstructural features like inclusions would be the same in both the Charpy impact tests and ultra-low cycle loadings.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Science and Engineering: A - Volume 668, 21 June 2016, Pages 30-37
Journal: Materials Science and Engineering: A - Volume 668, 21 June 2016, Pages 30-37
نویسندگان
M. Kermajani, F. Malek Ghaini, R. Miresmaeili, A.A. Aghakouchak, M. Shadmand,