Effect of yttria inclusion on room temperature tensile properties of investment cast TiAl

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Effect of yttria inclusion on room temperature tensile properties of investment cast TiAl. / Lin, Bochao; Liu, Renci; Jia, Qing; Cui, Yuyou; Withey, Paul A.; Yang, Rui.

In: Materials Science and Engineering A, Vol. 712, 17.01.2018, p. 73-79.

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Lin, Bochao ; Liu, Renci ; Jia, Qing ; Cui, Yuyou ; Withey, Paul A. ; Yang, Rui. / Effect of yttria inclusion on room temperature tensile properties of investment cast TiAl. In: Materials Science and Engineering A. 2018 ; Vol. 712. pp. 73-79.

Bibtex

@article{056cfc6ff8c842b6ad63e987ceaf1172,
title = "Effect of yttria inclusion on room temperature tensile properties of investment cast TiAl",
abstract = "Yttria is the best face coat material in the shell mold for the investment casting of γ-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.",
keywords = "TiAI , investment casting , yttria inclusion , tensile properties",
author = "Bochao Lin and Renci Liu and Qing Jia and Yuyou Cui and Withey, {Paul A.} and Rui Yang",
year = "2018",
month = jan,
day = "17",
doi = "10.1016/j.msea.2017.11.100",
language = "English",
volume = "712",
pages = "73--79",
journal = "Materials Science and Engineering A",
issn = "0921-5093",
publisher = "Elsevier",

}

RIS

TY - JOUR

T1 - Effect of yttria inclusion on room temperature tensile properties of investment cast TiAl

AU - Lin, Bochao

AU - Liu, Renci

AU - Jia, Qing

AU - Cui, Yuyou

AU - Withey, Paul A.

AU - Yang, Rui

PY - 2018/1/17

Y1 - 2018/1/17

N2 - Yttria is the best face coat material in the shell mold for the investment casting of γ-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.

AB - Yttria is the best face coat material in the shell mold for the investment casting of γ-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.

KW - TiAI

KW - investment casting

KW - yttria inclusion

KW - tensile properties

U2 - 10.1016/j.msea.2017.11.100

DO - 10.1016/j.msea.2017.11.100

M3 - Article

VL - 712

SP - 73

EP - 79

JO - Materials Science and Engineering A

JF - Materials Science and Engineering A

SN - 0921-5093

ER -