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题名: Notched tensile strength of SP-700 laser welds
作者: L.W. Tsay;Y.S. Ding;W.C. Chung;C. Chen
贡献者: NTOU:Institute of Materials Engineering
國立臺灣海洋大學:材料工程研究所
关键词: Notched tensile strength;Laser welding;Ti-4.5Al-3V-2Mo-2Fe;Ti-6Al-4V
日期: 2008-03-15
上传时间: 2011-10-20T08:06:41Z
出版者: Materials Letters
摘要: abstract:Notched tensile tests were performed to evaluate the influence of post-weld heat treatments (PWHTs) on the notched tensile strength (NTS) of two α + β titanium alloy welds. The results indicated that SP-700 laser welds were notch brittle unless a high PWHT temperature, e.g. 760 °C, was applied. The lowest NTS was associated with the peak-aged weld, which was aged at 482 °C for 1 h. In contrast, Ti-6Al-4V welds did not exhibit notch sensitivity in the as-welded or in the PWHT conditions. The reduced plasticity due to the strengthening of fine α in the β matrix account for the observed notch brittleness of the SP-700 laser welds. Increasing the PWHT temperature associated with coarsening the α + β structure reduced the notch sensitivity of SP-700 laser welds.
關聯: 62(6-7), pp.1114–1117
URI: http://ntour.ntou.edu.tw/handle/987654321/23583
显示于类别:[材料工程研究所] 期刊論文

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