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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
发表期刊MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
ISSN0921-5093
卷号712页码:73-79
摘要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.; 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.
部门归属[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
关键词Mold Materials Titanium Alloys Refractories Tolerance Fatigue
学科领域Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
收录类别SCI
语种英语
文献类型期刊论文
条目标识符http://ir.imr.ac.cn/handle/321006/79575
专题中国科学院金属研究所
通讯作者Yang, R (reprint author), Chinese Acad Sci, Inst Met Res, 72 Wenhua Rd, Shenyang 110016, Liaoning, Peoples R China.
推荐引用方式
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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