Enhancement of tensile plastic stability of Ti-based metallic glass composite with substrate of titanium alloy
Enhancement of tensile plastic stability of Ti-based metallic glass composite with substrate of titanium alloy
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DOI：
10.1016/j.jallcom.2022.165916
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发表时间：
2022-06
影响因子：
6.2
通讯作者：
Guoning Ji;Jun Xiang;Jingsong Wei;Minghua Chen;R. Zhao;Xiao-feng Wu;Shun-hua Chen;Fu-fa Wu
中科院分区：
文献类型：
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作者：
Guoning Ji;Jun Xiang;Jingsong Wei;Minghua Chen;R. Zhao;Xiao-feng Wu;Shun-hua Chen;Fu-fa Wu
研究了以钛合金为基体的钛基非晶复合材料的拉伸塑性稳定性。研究结果表明，MGC双金属的拉伸塑性稳定性与基体的屈服强度和几何尺寸密切相关。高强度的Ti6Al4V（T64）合金基体能显著提高MGC的塑性，而低强度的纯钛（PT）复合的MGC基体塑性稳定性较差。进一步的研究结果表明，随着PT基片厚度比的增加，MGC的塑性稳定性显著提高。从归一化应变硬化率的角度对双金属塑性稳定性的提高进行了解释和讨论。这些结果表明，通过优化几何尺寸，选择合适的填充剂可以提高MGCs的塑性稳定性。
The tensile plastic stability of Ti-based metallic glass composites (MGCs) with substrates of titanium alloys was investigated. The findings have shown that the tensile plastic stability of MGC bimetals was significantly dependent on both the yield strength and geometrical dimension of the substrate. The substrate of high-strength Ti6Al4V (T64) alloy can enhance the ductility of the MGC greatly, while the MGC bimetal combined with low-strength pure titanium (PT) displayed worsen plastic stability. Further results showed that the plastic stability of the MGC was enhanced remarkably by increasing the thickness ration of the PT substrate. The enhancement of plasticity stability in the bimetals were explained and discussed from the perspective of normalized strain-hardening rate. These findings indicates that the plastic stability of MGCs can be enhanced by suitable reinforcer with optimized geometrical dimension.