http://scholars.ntou.edu.tw/handle/123456789/4654
標題: | Effects of Aging Treatments on the Mechanical Behavior of Ti-15V-3Cr-3Sn-3Al Alloy | 作者: | Chou, Y. K. Leu-Wen Tsay Chen, C. |
關鍵字: | J-integral;notched tensile strength;Ti-15V-3Cr-3Sn-3Al | 公開日期: | 九月-2015 | 卷: | 24 | 期: | 9 | 起(迄)頁: | 3365–3372 | 來源出版物: | Journal of Materials Engineering and Performance | 摘要: | 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. |
URI: | http://scholars.ntou.edu.tw/handle/123456789/4654 | ISSN: | 1059-9495 | DOI: | 10.1007/s11665-015-1622-y |
顯示於: | 光電與材料科技學系 |
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