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A mechanistic study for the fracture mode and ductility variation in a powder metallurgy superalloy hot-isostatic-pressed at sub- and super-solvus temperatures
Chang, Litao; Jin, Hao
2019-01-16
Source PublicationMATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
ISSN0921-5093
Volume743Pages:733-740
AbstractThe mechanisms responsible for tensile fracture mode and ductility variation in a powder metallurgy superalloy hot-isostatic-pressed (HIPed) at near gamma'-solvus temperatures have been studied. The presence of deformed structure, decoration of precipitates along the prior particle boundaries and the duplex grain structure were identified as the microstructural features responsible for the inter-particle dominant fracture and low ductility of the sub-solvus HIPed material. They led to strain localization near the prior particle boundaries and crack initiation along them, which were decorated with precipitates and provided easy propagation paths for cracks. Whilst the increased grain size, increased grain size uniformity as well as unpinning of the prior particles boundaries precipitates, were identified as the factors contributing to the high ductility of the super-solvus HIPed material, which featured a more transgranular dominant fracture. The results presented also provide new insights in improving the processing of this type of materials.
KeywordSuperalloy Hot-isostatic-press gamma '-phase Prior particle boundaries Strain localization EBSD
Indexed BySCI
Language英语
WOS IDWOS:000456891500082
PublisherELSEVIER SCIENCE SA
Citation statistics
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/81450
Collection中国科学院金属研究所
Recommended Citation
GB/T 7714
Chang, Litao,Jin, Hao. A mechanistic study for the fracture mode and ductility variation in a powder metallurgy superalloy hot-isostatic-pressed at sub- and super-solvus temperatures[J]. MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,2019,743:733-740.
APA Chang, Litao,&Jin, Hao.(2019).A mechanistic study for the fracture mode and ductility variation in a powder metallurgy superalloy hot-isostatic-pressed at sub- and super-solvus temperatures.MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,743,733-740.
MLA Chang, Litao,et al."A mechanistic study for the fracture mode and ductility variation in a powder metallurgy superalloy hot-isostatic-pressed at sub- and super-solvus temperatures".MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING 743(2019):733-740.
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