| Microstructure and elevated temperature tensile behaviour of directionally solidified nickel based superalloy | |
| L. Y. Sheng; F. Yang; T. F. Xi; C. Lai; J. T. Guo | |
| 2013 | |
| Source Publication | Materials Research Innovations
 |
| ISSN | 1432-8917 |
| Volume | 17Pages:S101-S106 |
| Abstract | In this paper, a nickel based superalloy with good corrosion resistance is fabricated by directional solidification, and its microstructure and tensile properties were investigated. Microstructure observations reveal that besides the gamma' precipitates and gamma matrix, some MC, Ni5Hf and M3B2 particles precipitate along the grain boundary. Tensile tests exhibit that the alloy has obvious anomalous yield and intermediate temperature brittleness (ITB) behaviour. The tensile properties depend on temperature significantly. Below 650 degrees C, the yield strength decreases slightly but rises rapidly between 650 and 750 degrees C, and after then, it decreases gradually with temperature increasing further. Examination by TEM exhibits that sharing of the gamma' by dislocation is almost the main deformation mechanism at low temperature, but the gamma' bypass dominates the deformation at high temperature and the transition temperature should be similar to 800 degrees C. In addition, the carbides and eutectic structure contribute partly to the ITB behaviours. |
| description.department | [sheng, l. y. ; xi, t. f. ; lai, c.] peking univ, shenzhen inst, shenzhen 518057, peoples r china. [yang, f.] shenzhen baoan int airport, shenzhen airlines, shenzhen 518128, peoples r china. [guo, j. t.] chinese acad sci, inst met res, shenyang 110016, peoples r china. ; sheng, ly (reprint author), peking univ, shenzhen inst, shenzhen 518057, peoples r china. ; lysheng@yeah.net |
| Keyword | Nickel Based Superalloy Directional Solidification Microstructure Mechanical Properties Compressive Properties Single-crystals Alloys Creep Deformation Instability Extrusion Ductility Strength |
| URL | 查看原文 |
| Language | 英语 |
| Document Type | 期刊论文 |
| Identifier | http://ir.imr.ac.cn/handle/321006/71451 |
| Collection | 中国科学院金属研究所 |
| Recommended Citation GB/T 7714 | L. Y. Sheng,F. Yang,T. F. Xi,et al. Microstructure and elevated temperature tensile behaviour of directionally solidified nickel based superalloy[J]. Materials Research Innovations,2013,17:S101-S106. |
| APA | L. Y. Sheng,F. Yang,T. F. Xi,C. Lai,&J. T. Guo.(2013).Microstructure and elevated temperature tensile behaviour of directionally solidified nickel based superalloy.Materials Research Innovations,17,S101-S106. |
| MLA | L. Y. Sheng,et al."Microstructure and elevated temperature tensile behaviour of directionally solidified nickel based superalloy".Materials Research Innovations 17(2013):S101-S106. |
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