电子束粉末床熔合及热处理TC11合金的动态压缩行为

IF 5.5 2区材料科学 Q1 MATERIALS SCIENCE, CHARACTERIZATION & TESTING

Materials Characterization Pub Date : 2025-09-19 DOI:10.1016/j.matchar.2025.115575

Wendi Wu , Shun Guo , Haiying Xu , Zhisheng Zhang , Yilei Shi , Xinghua Sang , Bo Yang , Zhuang Wang , Yong Peng , Qi Zhou , Kehong Wang

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引用次数: 0

摘要

本文研究了电子束粉末床熔合（EB-PBF）制备TC11钛合金的动态变形行为和显微组织演变，与传统工艺合金相比，这方面的研究还不够充分。对EB-PBF样品在不同温度下进行固溶时效处理，系统研究了EB-PBF样品的相组成、显微组织和动态压缩性能。沉积态合金表现出具有较强Burgers取向关系的片层α和晶间β相，而1000℃热处理则析出细针状α′条。动态压缩试验表明，位错积累、晶粒旋转和101¯2<；1¯011>；拉伸孪晶主导了变形过程，而剧烈剪切促进绝热剪切带（ASB）的形成，随后是微空洞形核和裂纹扩展。与α菌落相比，篮织结构的织构较弱，SF分布较宽。这些结果为研究EB-PBF钛合金的高应变速率变形机制提供了新的见解。

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Dynamic compression behavior of TC11 alloy fabricated by electron beam powder bed fusion and heat treatment

This study investigates the dynamic deformation behavior and microstructural evolution of TC11 titanium alloy fabricated by electron beam powder bed fusion (EB-PBF), which remains insufficiently understood compared with conventionally processed alloys. EB-PBF samples were subjected to solution-aging treatments at different temperatures, and their phase composition, microstructure, and dynamic compression properties were systematically investigated. The as-deposited alloy exhibits lamellar α and intergranular β phases with a strong Burgers orientation relationship, while heat treatment at 1000 °C induces the precipitation of fine acicular α' laths. Dynamic compression testing reveals that dislocation accumulation, grain rotation, and

(10 \bar{1} 2) < \bar{1} 011 >

tensile twins dominate the deformation process, whereas severe shear promotes adiabatic shear band (ASB) formation, followed by microvoid nucleation and crack propagation. The basketweave structure exhibits weakened texture and a broader SF distribution compared with α colony. These results provide new insights into how distinct microstructural morphologies govern the high strain rate deformation mechanisms of EB-PBF titanium alloys.

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来源期刊

Materials Characterization 工程技术-材料科学：表征与测试

CiteScore

7.60

自引率

8.50%

发文量

746

审稿时长

36 days

期刊介绍： Materials Characterization features original articles and state-of-the-art reviews on theoretical and practical aspects of the structure and behaviour of materials. The Journal focuses on all characterization techniques, including all forms of microscopy (light, electron, acoustic, etc.,) and analysis (especially microanalysis and surface analytical techniques). Developments in both this wide range of techniques and their application to the quantification of the microstructure of materials are essential facets of the Journal. The Journal provides the Materials Scientist/Engineer with up-to-date information on many types of materials with an underlying theme of explaining the behavior of materials using novel approaches. Materials covered by the journal include: Metals & Alloys Ceramics Nanomaterials Biomedical materials Optical materials Composites Natural Materials.