Hot deformation behavior and microstructural evolution of titanium-aluminum based alloy during hot compression Warmverformungsverhalten and gefügetechnische Entwicklung von Titan-Aluminium-Legierungen bei der Warmverdichtung

IF 1.2 4区材料科学 Q4 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materialwissenschaft und Werkstofftechnik Pub Date : 2024-08-14 DOI:10.1002/mawe.202300391

Z. X. Duan, H. Chen, Y. X. Shen, L. P. Liu, X. R. Feng, X. L. Song, H. H. Zou, Y. Han, X. Ran, H. Chen

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Abstract

In this paper, titanium-aluminum based alloy was successfully prepared by introducing titanium powders using powder metallurgy. The experimental results indicated that the microstructures of alloys were composed of the new trititanium-aluminium layers skeleton and the γ+α₂ phases filler, which exhibited excellent compression properties. The compressive strength of the titanium-aluminum based alloy (10 wt.% titanium) were 509.9 MPa, higher than monolithic Ti-48Al-2Cr-2Nb alloy at 800 °C and 1×10⁻⁴ s⁻¹. The deformation mechanism is mainly referred to the motion and rotation of γ+α₂ areas and dynamic recrystallization. The γ+α₂ areas were surrounded by complete new trititanium-aluminium layers, which is beneficial to dislocation pile-up, cross and tangle at grain boundaries, resulting in high strength. Besides, the dislocation pile of γ, α₂ phase, and twins in γ phases, are the deformation mechanism in alloys.

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钛铝合金在热压缩过程中的热变形行为和微观结构演变钛铝合金在热压缩过程中的热变形行为和微观结构演变

本文采用粉末冶金法引入钛粉，成功制备了钛铝基合金。实验结果表明，合金的微观结构由新的钛铝层骨架和γ+α2相填料组成，具有优异的压缩性能。在 800 °C 和 1×10-4 s-1 条件下，钛铝基合金（钛含量为 10 wt.%）的抗压强度为 509.9 MPa，高于整体 Ti-48Al-2Cr-2Nb 合金。变形机理主要是指γ+α2区域的运动和旋转以及动态再结晶。γ+α2区域被完整的新钛铝层包围，有利于位错在晶界堆积、交叉和纠结，从而产生高强度。此外，γ、α2 相的位错堆积和γ相中的孪晶是合金的变形机制。

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来源期刊

Materialwissenschaft und Werkstofftechnik 工程技术-材料科学：综合

CiteScore

2.10

自引率

9.10%

发文量

154

审稿时长

4-8 weeks

期刊介绍： Materialwissenschaft und Werkstofftechnik provides fundamental and practical information for those concerned with materials development, manufacture, and testing. Both technical and economic aspects are taken into consideration in order to facilitate choice of the material that best suits the purpose at hand. Review articles summarize new developments and offer fresh insight into the various aspects of the discipline. Recent results regarding material selection, use and testing are described in original articles, which also deal with failure treatment and investigation. Abstracts of new publications from other journals as well as lectures presented at meetings and reports about forthcoming events round off the journal.