Investigation of welding parameter dependent microstructure and mechanical properties in friction stir welded pure Ti joints

Hidetoshi Fujii; Yufeng Sun; Hideaki Kato; Kazuhiro Nakata

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Investigation of welding parameter dependent microstructure and mechanical properties in friction stir welded pure Ti joints

机译：纯钛搅拌摩擦焊接中与焊接参数有关的组织和力学性能的研究

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Commercial purity titanium plates with 2 mm in thickness were successfully friction stir butt-welded at a welding speed ranged from 50 to 300 mm/min. The measured peak temperatures during all the welding processes were below the α/β phase transformation point. The microstructural characterization revealed that the stir zone has an equiaxial grain structure and low density of dislocations at lower welding speed, but a high density of dislocations at higher welding speed. The optimized tensile property was obtained for the specimen welded at 200 mm/min. The mechanical properties related to the microstructural evolution were investigated and discussed by comparing with the Al (fcc) and IF steel (bcc) results.

机译：将厚度为2 mm的市售纯钛板成功地以50至300 mm / min的焊接速度进行摩擦搅拌对焊。在所有焊接过程中测得的峰值温度均低于α/β相变点。显微组织特征表明，搅拌区在较低的焊接速度下具有等轴晶粒结构和低的位错密度，而在较高的焊接速度下具有高的位错密度。对于以200 mm / min的速度焊接的样品，获得了最佳的拉伸性能。通过与Al（fcc）和IF钢（bcc）结果进行比较，研究和讨论了与显微组织演变有关的力学性能。

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来源
《Materials Science and Engineering》 |2010年第15期|p.3386-3391|共6页
作者
Hidetoshi Fujii; Yufeng Sun; Hideaki Kato; Kazuhiro Nakata;
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作者单位

Joining and Welding Research Institute, Osaka University, 11-1 Mihogaoka, lbaraki 567-0047, Japan;

Joining and Welding Research Institute, Osaka University, 11-1 Mihogaoka, lbaraki 567-0047, Japan;

Joining and Welding Research Institute, Osaka University, 11-1 Mihogaoka, lbaraki 567-0047, Japan;

Joining and Welding Research Institute, Osaka University, 11-1 Mihogaoka, lbaraki 567-0047, Japan;

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原文格式 PDF
正文语种 eng
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关键词
friction stir welding; mechanical properties; dynamic recrystallization; hall-petch relation;

机译：搅拌摩擦焊;机械性能动态重结晶;霍尔关系;

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Investigation of welding parameter dependent microstructure and mechanical properties in friction stir welded pure Ti joints

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