Oxidation behavior in static air and its effect on tensile properties of a powder metallurgy EP962NP nickel-based superalloy

被引：7
|
作者：
Sun, Bing [1 ]
Zhang, Tiebang [1 ,2 ]
Song, Lin [1 ]
Zhang, Lei [1 ]
机构：
[1] Northwestern Polytech Univ, State Key Lab Solidificat Proc, Xian 710072, Peoples R China
[2] Northwestern Polytech Univ, Chongqing Innovat Ctr, Chongqing 401135, Peoples R China
来源：
JOURNAL OF ALLOYS AND COMPOUNDS | 2023年 / 934卷
关键词：
Nickel-based superalloys; Microstructure evolution; Oxidation mechanism; Tensile properties; Internal oxidation; HIGH-TEMPERATURE OXIDATION; NI-BASED SUPERALLOY; CYCLIC OXIDATION; INTERNAL OXIDATION; ALLOY; MECHANISM; RESISTANCE; EVOLUTION; KINETICS; MICROSTRUCTURE;
D O I：
10.1016/j.jallcom.2022.167795
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：
Oxidation behavior and its effect on tensile properties of a powder metallurgy EP962NP superalloy have been investigated. Results show that the oxidation resistance of studied alloy has been improved by hot isostatic pressing as compared to the as-cast one. Oxidation process of the alloy powder metallurgy EP962NP is limited by diffusion of Cr3+ due to oxidation activation energy of 244.1 kJmiddotmol-1. In addition, the main reason for cracking and spalling during steady-state oxidation can be inferred as the rapid increase in growth stress caused by spinel. Interestingly, the tensile samples oxidized at 900 degrees C exhibit improved plasticity due to the refinement of gamma ' caused by octet splitting.(c) 2022 Elsevier B.V. All rights reserved.
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页数：13
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