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Oxygen induced phase transformation in an alpha plus beta titanium alloy
Liu, Chengze; Li, Geping; Yuan, Fusen; Ali, Muhammad; Han, Fuzhou; Zhang, Yingdong; Gu, Hengfei
2019-02-01
Source PublicationMATERIALS CHEMISTRY AND PHYSICS
ISSN0254-0584
Volume223Pages:75-77
AbstractIt is critical to understand oxygen (O) ingress behavior in titanium alloys at high temperatures, since it was directly associated with their high-temperature performance. Investigations revealed that the diffusion of O would result in a uniform alpha-case layer beneath the surfaces of titanium alloys. This layer greatly affected the mechanical performance of the alloys. In the present study, a novel O ingress phenomenon in an alpha + beta titanium alloy was observed. After the isothermal treatment in the air, a two-layered region beneath the specimen surfaces was formed: the outer layer (layer A) uniformly grew parallel to the diffusion direction of O; while the inner layer (layer B) precipitated within the first beta grain beneath layer A, arranging in specific orientations. By experimental investigation as well as theoretical analysis, the formation mechanism of the unique layers was understood: with the diffusion of O, an alpha + beta layer (layer A) was uniformly formed beneath the specimen surfaces, while creating a new interface between layer A and the matrix. This interface acted similarly as alpha(GB)( )during the precipitation of alpha(WGB) (layer B). In addition, Burgers orientation relationship was strictly obeyed during the formation of layer B.
KeywordPhase transformation Titanium Interface EBSD Nucleation
Indexed BySCI
Language英语
WOS IDWOS:000456902400011
PublisherELSEVIER SCIENCE SA
Citation statistics
Cited Times:2[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/81411
Collection中国科学院金属研究所
Recommended Citation
GB/T 7714
Liu, Chengze,Li, Geping,Yuan, Fusen,et al. Oxygen induced phase transformation in an alpha plus beta titanium alloy[J]. MATERIALS CHEMISTRY AND PHYSICS,2019,223:75-77.
APA Liu, Chengze.,Li, Geping.,Yuan, Fusen.,Ali, Muhammad.,Han, Fuzhou.,...&Gu, Hengfei.(2019).Oxygen induced phase transformation in an alpha plus beta titanium alloy.MATERIALS CHEMISTRY AND PHYSICS,223,75-77.
MLA Liu, Chengze,et al."Oxygen induced phase transformation in an alpha plus beta titanium alloy".MATERIALS CHEMISTRY AND PHYSICS 223(2019):75-77.
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