Oxygen induced phase transformation in an alpha plus beta titanium alloy
Liu, Chengze1,2; Li, Geping1; Yuan, Fusen1,2; Ali, Muhammad1,2; Han, Fuzhou1,2; Zhang, Yingdong1,2; Gu, Hengfei1,3
Corresponding AuthorLi, Geping(
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
WOS Research AreaMaterials Science
WOS SubjectMaterials Science, Multidisciplinary
WOS IDWOS:000456902400011
Citation statistics
Cited Times:2[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Corresponding AuthorLi, Geping
Affiliation1.Chinese Acad Sci, Inst Met Res, 72 Wenhua Rd, Shenyang 110016, Liaoning, Peoples R China
2.Univ Sci & Technol China, Sch Mat Sci & Engn, 96 JinZhai Rd, Hefei 230026, Anhui, Peoples R China
3.Univ Chinese Acad Sci, 19 Yuquan Rd, Beijing 100049, Peoples R China
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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