Friction weldability of ultrafine-grained titanium grade 2

IF 3.8 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Journal of Advanced Joining Processes Pub Date : 2024-08-26 DOI:10.1016/j.jajp.2024.100246

Beata Skowrońska , Tomasz Chmielewski , Michał Baranowski , Mariusz Kulczyk , Jacek Skiba

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Abstract

The paper presents the results of an experimental study of the friction weldability of Titanium Grade 2 with ultrafine-grained (UFG) microstructure obtained by hydrostatic extrusion and rotary swaging (HE+RS). High-speed friction welding with different rotational speed (n) values was used as a joining method. The best properties were obtained for n=7000 rpm. Metallographic observations confirmed the formation of a continuous friction joint with a changed microstructure of the base material in the thermal-mechanical affected zone (TMAZ) and a friction weld (FW). The results of the mechanical properties showed the greatest decrease in hardness in the TMAZ. The friction welded joint had an 18 % lower tensile strength value than initial state UFG Titanium Grade 2 after the HE+RS process (with UTS=1050 MPa).

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超细晶粒钛 2 级的摩擦焊接性

本文介绍了通过静水挤压和旋转锻造（HE+RS）获得的具有超细晶粒（UFG）微观结构的 2 级钛的摩擦焊接性实验研究结果。采用不同转速（n）值的高速摩擦焊作为连接方法。n=7000 rpm 时获得了最佳性能。金相学观察证实，在热机械影响区（TMAZ）和摩擦焊缝（FW）中形成了母材微观结构发生变化的连续摩擦接头。机械性能结果表明，TMAZ 的硬度下降幅度最大。在 HE+RS 工艺（UTS=1050 兆帕）之后，摩擦焊接接头的抗拉强度值比初始状态的 UFG 钛 2 级低 18%。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Journal of Advanced Joining Processes Multiple-

CiteScore

7.10

自引率

9.80%

发文量

审稿时长

44 days