The low cycle fatigue property, damage mechanism, and life prediction of additively manufactured Inconel 625: Influence of temperature

被引：5

作者：

Liu, Meng ^{[1
,2
,3
]}

Cai, Yifang ^{[1
,2
]}

Wang, Quanyi ^{[1
,2
]}

Jiang, Yunqing ^{[1
,2
]}

Zou, Tongfei ^{[1
,2
]}

Wang, Yunru ^{[1
,2
]}

Li, Qingsong ^{[3
]}

Pei, Yubing ^{[3
]}

Zhang, Hong ^{[1
,2
,3
]}

Liu, Yongjie ^{[1
,2
]}

Wang, Qingyuan ^{[1
,2
,4
]}

机构：

[1] Sichuan Univ, Coll Architecture & Environm, Failure Mech & Engn Disaster Prevent & Mitigat, Key Lab Sichuan Prov, Chengdu, Peoples R China

[2] Sichuan Univ, Key Lab Deep Underground Sci & Engn, Minist Educ, Chengdu, Peoples R China

[3] Dongfang Turbine Co Ltd, State Key Lab Long Life High Temp Mat, Deyang, Peoples R China

[4] Chengdu Univ, Sch Architecture & Civil Engn, Chengdu, Peoples R China

来源：

FATIGUE & FRACTURE OF ENGINEERING MATERIALS & STRUCTURES | 2023年 / 46卷 / 10期

基金：

中国国家自然科学基金;

关键词：

additive manufacturing; failure mechanism; LCF; life prediction; microstructure evolution; NICKEL-BASED SUPERALLOY; ROOM-TEMPERATURE; DYNAMIC RECRYSTALLIZATION; DEFORMATION-BEHAVIOR; FRACTURE-BEHAVIOR; ENERGY DEPOSITION; CRACK INITIATION; SERRATED FLOW; STRAIN-ENERGY; DELTA-PHASE;

D O I：

10.1111/ffe.14106

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

Symmetrical high-temperature low-cycle fatigue tests were performed in this study to examine the influence of temperature on the fatigue failure mechanism of the additively manufactured Inconel 625. According to the fracture analysis, cracks initiate from the crystallographic plane at room temperature. At 600 & DEG;C, oxidation of carbides leads to crack initiation. The strengthening effect of & gamma;& DPRIME; precipitation prevents crack propagating within the matrix. At 750 & DEG;C, the crack becomes transgranular propagating, as a consequence of & gamma;& DPRIME;-& delta; transformation. Geometrically necessary dislocations distribution on the fracture supports this result. Furthermore, a modified life prediction formula considering effect of temperature and strain amplitude was established. It was observed that the modified model predicted the fatigue life of the studied materials well in both test conditions.

引用

页码：3829 / 3845

页数：17

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