Tensile and compressive creep behavior of in718 alloy manufactured by selective laser melting

Xu，Zhen1,2,3; Guo，Chuan2,3; Yu，Zhenrong2,3; Li，Xin1,2; Hu，Xiaogang2,3; Zhu，Qiang2,3

2020

0255-5476

1662-9752

MATER SCI FORUM

986 MSF

102-108

Tensile and compressive creep behavior of SLMed IN718 alloy under 973K (700℃) were investigated. Crept samples were analyzed by SEM and TEM to expose evolution of microstructure, precipitates and dislocation structure during the creep process. Results show that initial creep rate under compression is higher than under tension for the same creep conditions. Minimum creep rates are approximately the same both in tensile and compressive creep tests. The different creep behaviors may be related to the fact that tension stress promotes precipitations of fine needle-like γ′′ phases, while compression stress promotes precipitations of large size δ phases. The tension-compression asymmetry owns to the increment of chemical potential varying with the stress orientation.

Creep IN718 Selective laser melting

通讯

英语

EI

20202808911503

Melting ; Selective laser melting

Reproduction, Copying:745.2 ; Chemical Operations:802.3 ; Materials Science:951

2-s2.0-85087442325

Scopus

1.Harbin Institute of Technology,Harbin,China
2.Southern University of Science and Technology,Shenzhen,China
3.Shenzhen Key Laboratory for Additive Manufacturing of High-performance Materials,China

Xu，Zhen,Guo，Chuan,Yu，Zhenrong,et al. Tensile and compressive creep behavior of in718 alloy manufactured by selective laser melting[C],2020:102-108.