کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7981607 | 1514746 | 2014 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Microstructure and fatigue performance of butt-welded joints in advanced high-strength steels
ترجمه فارسی عنوان
عملکرد میکروارگانیسم و خستگی اتصالات جوش داده شده در فولادهای پیشرفته با مقاومت بالا
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کلمات کلیدی
فولادهای پیشرفته با مقاومت بالا، جوش قوس الکتریکی گاز زندگی خستگی ریز ساختار، هندسه مهره جوش،
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
دانش مواد (عمومی)
چکیده انگلیسی
This study presents a comparative analysis of the high-cycle fatigue behaviors of butt weld joints in advanced high-strength steels with different strength levels and weld bead geometry. Welded joints were made using a gas metal arc welding (GMAW) process on dual-phase steels (DP440 and DP590) and martensitic steel (MS) with tensile strengths of 440, 590, and 1500Â MPa, respectively. The microstructures with the lowest hardness were found at the base metal, the sub-critical heat-affected zone (HAZ), and the fusion zone for DP440, DP590, and MS weldments, respectively. Fatigue failure of specimens without weld beads occurred at the points of lowest hardness, and fatigue life exhibited the order MS>DP590>DP440, similar to the order of lowest hardness values in each weldment. However, the introduction of high weld beads resulted in very short, similar fatigue lives for all welded joints and fracture occurred at weld toe due to the overwhelming stress concentration effect. A transition from geometry-governed fracture toward microstructure-governed fracture was investigated by varying weld bead heights.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Science and Engineering: A - Volume 597, 12 March 2014, Pages 342-348
Journal: Materials Science and Engineering: A - Volume 597, 12 March 2014, Pages 342-348
نویسندگان
Godwin Kwame Ahiale, Yong-Jun Oh,