Fatigue behavior of AISI 8620 steel exposed to magnetic field

被引：15
作者：
Choi, Kyoung Joon [1 ]
Yoo, Seung Chang [2 ]
Ham, Junhyuk [2 ]
Kim, Ji Hyun [2 ]
Jeong, Soo Yeol [1 ]
Choi, Yeon Suk [1 ]
机构：
[1] Korea Basic Sci Inst, Gwahak Ro 169-148, Daejeon 34133, South Korea
[2] Ulsan Natl Inst Sci & Technol, Sch Nucl Engn, UNIST Gil 50, Ulsan 44919, South Korea
来源：
JOURNAL OF ALLOYS AND COMPOUNDS | 2018年 / 764卷
关键词：
Magnetic field; Fatigue lifetime; Microstructure; Mechanical properties; RESIDUAL-STRESS REDUCTION; METAL WELD INTERFACES; LOW-ALLOY STEEL; MECHANICAL-PROPERTIES; MICROSTRUCTURE; TEMPERATURE; INTERDIFFUSION; STRENGTH; SYSTEM; JOINTS;
D O I：
10.1016/j.jallcom.2018.05.347
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
In this study, the effect of magnetic field on AISI 8620 steel, which is commonly used in essential machinery components, was investigated in microstructural and mechanical aspects, and fatigue lifetime was finally evaluated. To prepare the steel exposed to magnetic field, cryo-cooled superconducting magnet system that generates a 10-T magnetic field was used in this study. The samples were exposed to 10-T magnetic field for 0 d, 10 d, and 20 d. The magnetic exposure induced the additional nucleation of cementite and the reduction of the compressive residual stress in the steel. This exposure resulted in extension of the fatigue lifetime by increments in yield strength, tensile strength and elongation, and the reduction of elastic modulus. This could occur because of the changes in mechanical properties induced by the additional precipitation of cementite and the relief of the compressive residual stress under magnetic field. (C) 2018 Elsevier B.V. All rights reserved.
引用
收藏
页码：73 / 79
页数：7
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