Influence of thermal exposure on the microstructures and mechanical properties of a superalloy
文献类型：期刊论文
| 作者 | Hou, JS; Guo, JT |
| 刊名 | JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE
 |
| 出版日期 | 2006-02-01 |
| 卷号 | 15期号:1页码:67-75 |
| 关键词 | mechanical properties microstructure nickel base superalloy thermal exposure |
| ISSN号 | 1059-9495 |
| DOI | 10.1361/105994906X83501 |
| 通讯作者 | Hou, JS(jshou@imr.ac.cn) |
| 英文摘要 | The effects of long-term aging on microstructures and their influence on tensile and stress-rupture behavior of a corrosion resistant nickel-base superalloy are investigated. Samples are aged isothermally at 1073, 1123, or 1173 K for different times of up to 10,000 h and mechanical tests are performed on samples in both standard heat treatment (SHT) and aged conditions. Scanning electron microscopy (SEM) studies reveal that the coarsening kinetics of gamma' follows a linear law at different temperatures with the calculated activation energy, i.e., 255 kJ/mol, for gamma' growth according to Lifshitz-Slyozof-Wagner (LSW) theory. After long-term aging for more than 1 khours, or phase appears in the alloy. The kinetics of sigma formation can be described by the Johnson-Avrime-Mehl equation. Tensile experiments at room temperature and 1173 K and endurance experiments at 1173 K/274 MPa are performed to test the effect of or phases on these properties and no remarkable harmful effect is found. gamma' coarsening can be used to explain the reduction of yield stress, which is tested by the Labusch-Schwarz hardening theory. Although the presence of the or phase clearly does affect the fracture process, the or phase does not embrittle the alloy. |
| WOS研究方向 | Materials Science |
| 语种 | 英语 |
| WOS记录号 | WOS:000235177300012 |
| 出版者 | ASM INTERNATIONAL |
| 源URL | [http://ir.imr.ac.cn/handle/321006/87443]  |
| 专题 | 金属研究所_中国科学院金属研究所 |
| 通讯作者 | Hou, JS |
| 作者单位 | Chinese Acad Sci, Met Res Inst, Dept Superalloys, Shenyang, Peoples R China |
| 推荐引用方式 GB/T 7714 | Hou, JS,Guo, JT. Influence of thermal exposure on the microstructures and mechanical properties of a superalloy[J]. JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE,2006,15(1):67-75. |
| APA | Hou, JS,&Guo, JT.(2006).Influence of thermal exposure on the microstructures and mechanical properties of a superalloy.JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE,15(1),67-75. |
| MLA | Hou, JS,et al."Influence of thermal exposure on the microstructures and mechanical properties of a superalloy".JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE 15.1(2006):67-75. |
入库方式： OAI收割
来源：金属研究所
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