Room and elevated temperature fatigue crack propagation behavior of Inconel 718 alloy fabricated by laser powder bed fusion

被引：41
|
作者：
Kim, Sumin [1 ]
Choi, Heesoo [1 ]
Lee, Jehyun [2 ]
Kim, Sangshik [1 ]
机构：
[1] Gyeongsang Natl Univ, Dept Mat Engn & Convergence Technol, ReCAPT, Jinju 52828, South Korea
[2] Changwon Natl Univ, Dept Met & Adv Mat Engn, Chang Won 51140, South Korea
来源：
INTERNATIONAL JOURNAL OF FATIGUE | 2020年 / 140卷
基金：
新加坡国家研究基金会;
关键词：
Additive manufacturing; Inconel; 718; Fatigue crack propagation; High temperature; Laser powder bed fusion; MECHANICAL-PROPERTIES; GROWTH-BEHAVIOR; MICROSTRUCTURE; SUPERALLOY; MICROMECHANISMS; EXPOSURE; DEFECTS; IN718;
D O I：
10.1016/j.ijfatigue.2020.105802
中图分类号：
TH [机械、仪表工业];
学科分类号：
0802 ;
摘要：
The fatigue crack propagation (FCP) behavior of Inconel 718 alloy manufactured by laser powder bed fusion (L-PBF) was studied at 25 and 650 degrees C, and compared to those of conventionally processed counterpart. The FCP rates of L-PBF Inconel 718 alloy were found to be significantly higher than those of conventionally processed counterpart at 25 degrees C in low and intermediate Delta K regimes. The FCP rates decreased in near-threshold Delta K regime at 650 degrees C, while the reversal occurred above Delta K of 7 MPa root m, as compared to those at 25 degrees C. The FCP behavior of L-PBF Inconel 718 alloy was discussed based on micrographic and fractographic analyses.
引用
收藏
页数：10
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