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任德春,刘玉敬,张慧博,王 健,金 伟,杨 锐.冷变形和时效热处理对TB9钛合金组织和性能影响[J].稀有金属材料与工程(英文),2020,49(3):1083~1089.[Ren Dechun,Liu Yujing,Zhang Huibo,Wang Jian,Jin Wei and Yang Rui.Influence of cold deformation and aging heat treatment on microstructure and mechanical property of TB9 titanium alloy[J].Rare Metal Materials and Engineering,2020,49(3):1083~1089.]
Influence of cold deformation and aging heat treatment on microstructure and mechanical property of TB9 titanium alloy
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Received:January 09, 2019  Revised:July 31, 2019
DOI:
Key words: TB9 titanium alloy  cold deformation  aging heat treatment  microstructure  mechanical property
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Author NameAffiliation
Ren Dechun,Liu Yujing,Zhang Huibo,Wang Jian,Jin Wei and Yang Rui  
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Abstract:
      The properties of titanium alloys can be improved by cold deformation and aging heat. However, there are limited report on the performance transformation of titanium alloys under the combination of cold deformation and aging heat treatment. In this work, the influence of prior cold deformation and the subsequent aging heat treatment on the phase types, α precipitation behaviors and the tensile properties of TB9 titanium alloy were studied using the X-ray diffraction, optical microstructure, scanning electron microscope and uniaxial tensile. The results showed that longitudinal and cross section of the bars formed different type macro texture through produced different microstructure and affected the microhardness. TB9 titanium alloy consisted of α and β phases after aging heat treatment. With the increase of the cold deformation rate, the tensile strength was increased and the ductile was reduced. Due to the defects produced during the cold deformation process, the precipitation free zones were disappeared in cold deformation samples and the mixmum tensile strength reach 1800MPa with an elongation of 4%.