Ti70合金板的组织与力学性能的各向异性

doi:10.13251/j.issn.0254-6051.2020.08.007

金属热处理 ›› 2020, Vol. 45 ›› Issue (8): 34-37.DOI: 10.13251/j.issn.0254-6051.2020.08.007

Ti70合金板的组织与力学性能的各向异性

郝晓博, 李渤渤, 刘茵琪, 张强, 李洋

中船重工七二五研究所洛阳双瑞精铸钛业有限公司, 河南洛阳 471023

收稿日期:2020-01-25 出版日期:2020-08-25 发布日期:2020-09-07
作者简介:郝晓博(1988—),男,工程师,硕士,主要研究方向为钛及钛合金的加工与应用,E-mail:haoxb10@163.com
基金资助:
郑洛新自创区产业集群专项(181200212500)

Microstructure and anisotropy of mechanical properties of Ti70 alloy plates

Hao Xiaobo, Li Bobo, Liu Yinqi, Zhang Qiang, Li Yang

Luoyang Sunrui Titanium Precision Casting Co. , Ltd. , Luoyang Ship Material Research Institute, Luoyang Henan 471023, China

Received:2020-01-25 Online:2020-08-25 Published:2020-09-07

摘要/Abstract

摘要： 通过拉伸及低温冲击试验、光学显微镜、扫描电镜及X射线衍射仪,对Ti70合金板的组织与力学性能的各向异性进行了研究。结果表明,Ti70合金板热轧及退火后组织未出现明显差异,退火过程中主要以回复为主,但在高密度位错的剪切带上出现了一定数量的再结晶晶粒。退火态Ti70合金板横向屈服强度及低温冲击吸收能量都高于纵向,但抗拉强度低于纵向,表现出了明显的各向异性。退火后Ti70合金板形成了较强的{0002}基面织构,其晶面法向向RD方向(纵向)偏转±30°,向TD(横向)方向偏转±41°。由于基面织构更向RD方向集中,因此造成了Ti70合金板力学性能的各向异性。

关键词: Ti70合金板, 微观组织, 力学性能, 各向异性

Abstract: Microstructure and anisotropy of mechanical properties of Ti70 alloy plates were studied by tensile test, low temperature impact test, optical microscopy, electron microscopy and X-ray diffraction analysis. The Results indicate that there is no obvious difference in microstructure between hot rolled and annealed Ti70 alloy plates. Recovery is the main process during annealing, with only a certain amount of recrystallized grains being found in the shear band with high density dislocations. The yield strength and low temperature impact absorbed energy of the transverse direction are higher than that of the rolling direction, whereas the tensile strength is just the opposite, indicating that the annealed Ti70 alloy plate shows significant anisotropy. After annealing the Ti70 alloy plate forms relatively strong {0002} basal texture, and its crystal plane normal direction deflects ±30° and ±41° respectively along the RD direction (longitudinal) and the TD direction (transverse). Basal texture is relatively concentrated in the rolling direction, which results in the anisotropy of mechanical properties of the Ti70 alloy plate.

Key words: Ti70 alloy plate, microstructure, mechanical properties, anisotropy

中图分类号:

TG146.23

郝晓博, 李渤渤, 刘茵琪, 张强, 李洋. Ti70合金板的组织与力学性能的各向异性[J]. 金属热处理, 2020, 45(8): 34-37.

Hao Xiaobo, Li Bobo, Liu Yinqi, Zhang Qiang, Li Yang. Microstructure and anisotropy of mechanical properties of Ti70 alloy plates[J]. Heat Treatment of Metals, 2020, 45(8): 34-37.

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Ti70合金板的组织与力学性能的各向异性

Microstructure and anisotropy of mechanical properties of Ti70 alloy plates

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