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Microstructures and mechanical properties of as-cast TiAl alloys with higher C additions.(Author abstract)

Wei, Zunjie ; Wang, Hongwei ; Jin, Yunyue ; Zhang, Hu ; Zeng, Songyan

Journal of Materials Science, May, 2002, Vol.37(9), p.1809 [Tạp chí có phản biện]

ISSN: 0022-2461

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  • Nhan đề:
    Microstructures and mechanical properties of as-cast TiAl alloys with higher C additions.(Author abstract)
  • Tác giả: Wei, Zunjie ; Wang, Hongwei ; Jin, Yunyue ; Zhang, Hu ; Zeng, Songyan
  • Chủ đề: Specialty Metals Industry -- Analysis ; Specialty Metals Industry -- Mechanical Properties
  • Là 1 phần của: Journal of Materials Science, May, 2002, Vol.37(9), p.1809
  • Mô tả: Byline: Zunjie Wei (1), Hongwei Wang (1), Yunyue Jin (1), Hu Zhang (2), Songyan Zeng (1) Abstract: TiAl alloys with higher C additions were fabricated using a XD.sup.TM method. The results investigated by XRD, OM and SEM indicated that in Ti-34Al-0.5C alloy, single phase TiC particles and particles having a "core" structure in which the TiC phase was coated by [Ti.sub.3]AlC phase were formed and they uniformly distributed at the grain boundaries. However, when C content is more than 0.5%, the particles with a plate-shape were single phase [Ti.sub.2]AlC and TiC phase coated by [Ti.sub.2]AlC phase. These results suggested that in TiAl alloys with higher C additions, the primary is TiC, and the [Ti.sub.3]AlC and [Ti.sub.2]AlC result from peritectic reaction, L + TiC. The results measured by MPM show that with the increasing of C content, the microhardness both TiC, [Ti.sub.3]AlC and [Ti.sub.2]AlC is higher than that of the matrix [Ti.sub.3]Al and TiAl. However, the elastic modulus of particle phases and matrix has little variation and no change tendency can be found with increasing C content. Author Affiliation: Article History: Registration Date: 12/10/2004
  • Ngôn ngữ: English
  • Số nhận dạng: ISSN: 0022-2461

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