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题名: Effects of aging treatments on the mechanical behavior of Ti-15V-3Cr-3Sn-3Al alloy
作者: Y.-K. Chou
L. W. Tsay
C. Chen
贡献者: 國立臺灣海洋大學:光電與材料科技學系
关键词: J-integral
notched tensile strength
Ti-15V-3Cr-3Sn-3Al
日期: 2015-07
上传时间: 2018-08-14T08:34:10Z
出版者: Journal of Materials Engineering and Performance
摘要: Abstract: The effect of aging treatments on the mechanical properties and microstructures of Ti-15V-3Cr-3Sn-3Al (Ti-15-3) alloy was evaluated using tensile, notched tensile, and J-integral tests. The properties for the one-step aged specimens (371 to 648 °C for 8 h) were compared with those for the two-step aged specimens (one-step aged + 426 °C/24 h). An increase in aging temperature of one-step aging resulted in increased notched tensile strength and fracture toughness of the Ti-15-3 alloy. The second-step aging at 426 °C for 24 h caused various degrees of hardening in the group of double aged specimens. Comparing to the one-step aged specimens, increased notch brittleness and decreased fracture toughness were observed in the two-step aged specimens. For the specimens subjected to aging at 648 °C, the formation of thick α layer at β grain boundaries resulted in lower tensile properties and fracture toughness. The fracture modes of the notch-brittle specimens were strongly affected by the distribution, size, and morphology of the α precipitates.
關聯: 24(9) pp.3365–3372
URI: http://ntour.ntou.edu.tw:8080/ir/handle/987654321/48158
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