Influence of thermal shock behavior on microstructure and mechanical properties of IN718 superalloy

被引：5
|
作者：
Wang, Shu-liang [1 ]
Sun, Yan-rong [1 ,2 ]
Du, Li-jing [1 ]
Liu, Li [1 ]
Wang, Jie [1 ]
Xiang, Ding-han [3 ]
机构：
[1] Southwest Petr Univ, Sch Mat Sci & Engn, Xindu Ave 8, Chengdu 610500, Sichuan, Peoples R China
[2] CNBM Chengdu Optoelect Mat Co Ltd, Chengdu 610500, Sichuan, Peoples R China
[3] Guilin Univ Elect Technol, Guangxi Key Lab Informat Mat, Guilin 541004, Peoples R China
来源：
APPLIED SURFACE SCIENCE | 2019年 / 484卷
基金：
中国国家自然科学基金;
关键词：
Thermal shock; Microstructure; Mechanical properties; Oxide films; delta phase; INCONEL; 718; DELTA-PHASE; OXIDATION BEHAVIOR; PRECIPITATION; STABILITY; EVOLUTION; KINETICS; RESISTANCE; MORPHOLOGY; AIR;
D O I：
10.1016/j.apsusc.2019.04.047
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：
The influence of thermal shock behavior between 960 degrees C and room temperature on microstructure and tensile properties of IN718 alloy after three heat treatments was investigated in this paper. The experiments show that protective and dense oxide films with the composition of Cr2O3, Ti0.95Nb0.95O4 and (Cr, Fe)(2)O-3 are formed on the surface of alloys. The average oxide films increased with the thermal shock cycle. The thermal shock behavior changed the distribution and quantities of delta phases, which have significantly reduced the strength and increased the elongation of IN718 alloy. The decrease of strength was mainly determined by the dissolution of strengthening phase and grain coarsening. High standard treatment alloy shows the best thermal shock resistance since the strength decreased smallest after thermal shock.
引用
收藏
页码：1282 / 1287
页数：6
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