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Characteristics of Fatigue Behavior and Fracture Surfaces by Rotary Bending Test in SM45C Welding Zone  

Lee, Yong-Bok (홍익대학교 기계.시스템디자인공학과)
Publication Information
Journal of the Korean Society of Manufacturing Technology Engineers / v.19, no.1, 2010 , pp. 26-32 More about this Journal
Abstract
SM45C steel rods using generally for machine components were selected and welded by butt-GMA welding method for this study. And then they were studied about characteristics of fatigue behavior and fracture surfaces by rotary bending test. Fatigue strength in weld zone present highly in order of the boundary between deposited metal zone and heat affected zone, deposited metal zone, heat affected zone. The region of infinite life by Haigh diagram present highly in order of the boundary between deposited metal zone and heat affected zone, deposited metal zone, heat affected zone. Fatigue cracks in unnotched specimens of base metal and weld zone introduce simultaneously from extensive out-side of circumferential cross-section and propagate to the other side indicating beach markings and dimples according to consolidation of fatigue cracks. Fatigue cracks in all of notched specimens introduce simultaneously in out-side of circumferential cross-section by high stresses and propagate to center of it indicating beach markings.
Keywords
Characteristics of Fatigue Behavior; Fracture Surface; Fatigue Strength; Weld Zone; Infinite Life; Fatigue Crack; Dimple; Beach Mark;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
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