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Effect of yttria inclusion on room temperature tensile properties of investment cast TiAl
Lin, BC; Liu, RC; Jia, Q; Cui, YY; Withey, PA; Yang, R; Yang, R (reprint author), Chinese Acad Sci, Inst Met Res, 72 Wenhua Rd, Shenyang 110016, Liaoning, Peoples R China.
2018-01-18
Source PublicationMATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
ISSN0921-5093
Volume712Pages:73-79
AbstractYttria is the best face coat material in the shell mold for the investment casting of gamma-TiAl alloys. However, yttria inclusions may occur in the cast products and there is a lack of knowledge about the influence of yttria inclusions on the mechanical properties of TiAl. In the present study, the effect of yttria inclusions on room temperature tensile properties of two investment cast TiAl alloys, Ti-45Al-2Mn-2Nb (at%) + 0.08 vol% TiB2 and Ti-46 Al-2 Nb-2Cr-0.15B (at%), were studied. The results show that tensile failure tends to initiate from yttria inclusions, resulting in reduced plastic strain and ultimate strength. Yttria inclusions differ in location (surface/internal), size, and morphology (agglomerate /whole piece), those with larger sizes or located at the sample surface being more harmful. The tensile properties of inclusion containing TiAl parts can be estimated using the size and location determined by X-ray inspection. The critical size at which inclusions become detrimental to the mechanical properties of TiAl was discussed.; Yttria is the best face coat material in the shell mold for the investment casting of gamma-TiAl alloys. However, yttria inclusions may occur in the cast products and there is a lack of knowledge about the influence of yttria inclusions on the mechanical properties of TiAl. In the present study, the effect of yttria inclusions on room temperature tensile properties of two investment cast TiAl alloys, Ti-45Al-2Mn-2Nb (at%) + 0.08 vol% TiB2 and Ti-46 Al-2 Nb-2Cr-0.15B (at%), were studied. The results show that tensile failure tends to initiate from yttria inclusions, resulting in reduced plastic strain and ultimate strength. Yttria inclusions differ in location (surface/internal), size, and morphology (agglomerate /whole piece), those with larger sizes or located at the sample surface being more harmful. The tensile properties of inclusion containing TiAl parts can be estimated using the size and location determined by X-ray inspection. The critical size at which inclusions become detrimental to the mechanical properties of TiAl was discussed.
description.department[lin, bochao ; liu, renci ; jia, qing ; cui, yuyou ; yang, rui] chinese acad sci, inst met res, 72 wenhua rd, shenyang 110016, liaoning, peoples r china ; [lin, bochao] univ chinese acad sci, 19 a yuquan rd, beijing, peoples r china ; [withey, paul a.] rolls royce plc, derby de24 8bj, england ; [withey, paul a.] univ birmingham, sch met & mat, birmingham b15 2tt, w midlands, england
KeywordMold Materials Titanium Alloys Refractories Tolerance Fatigue
Subject AreaNanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
Indexed BySCI
Language英语
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/79575
Collection中国科学院金属研究所
Corresponding AuthorYang, R (reprint author), Chinese Acad Sci, Inst Met Res, 72 Wenhua Rd, Shenyang 110016, Liaoning, Peoples R China.
Recommended Citation
GB/T 7714
Lin, BC,Liu, RC,Jia, Q,et al. Effect of yttria inclusion on room temperature tensile properties of investment cast TiAl[J]. MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,2018,712:73-79.
APA Lin, BC.,Liu, RC.,Jia, Q.,Cui, YY.,Withey, PA.,...&Yang, R .(2018).Effect of yttria inclusion on room temperature tensile properties of investment cast TiAl.MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,712,73-79.
MLA Lin, BC,et al."Effect of yttria inclusion on room temperature tensile properties of investment cast TiAl".MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING 712(2018):73-79.
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