Research on laser solid forming of a functionally gradient Ti-Ti2AlNb alloy

Jiantao Liu, Xin Lin, Xiaowei Lu, Jing Chen, Weidong Huang

科研成果: 期刊稿件文章同行评审

22 引用 (Scopus)

摘要

A functionally gradient Ti-Ti2AlNb alloy, which has continuous compositional gradient and regular outline with a length about 17 mm, was fabricated by laser solid forming. Phase morphological evolution and microstructure evolution, and microhardness along the compositional gradient direction were analyzed. With the increase of aluminum and niobium contents, a series of phase evolutions along the compositional gradient occurred: α′→ α+β →α+α′ → α′→ α+β → α+β/B2+α2 → β/B2+α2 →β/B2 → B2+α+O →B2, and the compositionally gradient material accomplished a transition of α titanium alloy, α+β titanium alloy, β titanium alloy, finally Ti2AlNb-based alloy. In the transition layers, the microhardness HV increased from 170 of Ti at the bottom to 470 of Ti2AlNb at the top. Based on the non-equilibrium phase diagram of the Ti-rich corner, the phase morphological evolution during forming were explained with the analysis of the influences of the Al and Nb on the stabilities of α, β and α2 phases in titanium alloys.

源语言英语
页(从-至)1006-1012
页数7
期刊Jinshu Xuebao/Acta Metallurgica Sinica
44
8
出版状态已出版 - 8月 2008

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