期刊论文详细信息
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING 卷:814
Microstructure and tensile properties of additive manufactured Ti-6Al-4V with refined prior-? grain structure obtained by rapid heat treatment
Article
Zou, Zhiyi1  Simonelli, Marco1  Katrib, Juliano2  Dimitrakis, Georgios2  Hague, Richard1 
[1] Univ Nottingham, Ctr Addit Mfg, Nottingham NG8 1BB, England
[2] Univ Nottingham, George Green Inst Electromagnet Res Grp, Nottingham NG8 1BB, England
关键词: Additive manufacturing;    Titanium alloys;    Rapid heat treatment;    Tensile properties;   
DOI  :  10.1016/j.msea.2021.141271
来源: Elsevier
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【 摘 要 】

Heat treatments tailored for additive manufactured Ti-6Al-4V can be used to attain desirable microstructures associated with superior mechanical properties. Rapid heat treatments, for example, can be used to recrystallise the microstructure of laser powder bed fusion (L-PBF) Ti-6Al-4V to obtain refined and quasi-equiaxed prior-? grains. In this study, we discuss the interplay between refined microstructures and the tensile properties of Ti6Al-4V specimens. The influence of individual microstructural constituents on the tensile properties are examined in detail and directly compared to those found in specimens subject to conventional annealing treatments. It was found that rapid heat treatments into the ? phase field can significantly refine the size of the prior-? grains found in as-built L-PBF Ti-6Al-4V, as well as alter the size and morphological arrangement of the resulting ? laths. The proposed new heat treatments are clearly shown to have strengthened the alloy with no apparent detriment to the ductility of the material.

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