Excellent room temperature ductility of as-cast TRIP high-entropy alloy via Mo and C alloying
Excellent room temperature ductility of as-cast TRIP high-entropy alloy via Mo and C alloying
复制标题
通过 Mo 和 C 合金化，铸态 TRIP 高熵合金具有优异的室温延展性
DOI：
10.1007/s10853-019-04064-9
复制
发表时间：
2020-02-01
影响因子：
4.5
通讯作者：
Wang, Xianhui
中科院分区：
文献类型：
--
作者：
Lv, Yukun;Zhao, Xuerou;Wang, Xianhui
系统研究了C和Mo合金元素对相变诱发塑性（TRIP）高熵合金（HEAs，Fe 50 Mn 30 Co 10 Cr 10）组织和性能的影响。结果表明，掺杂量为2at.%的TRIP-HEA铸态由于固溶强化，C呈现出高拉伸强度（类似于600 MPa）和高延展性（类似于67.4%）的优异组合。令人惊讶的是，添加1原子%的Mo促进拉伸强度（类似于658 MPa）的改善和延伸率（类似于89.8%）的显著增加，这远大于大多数报道的铸态HEAs。这是由于C和Mo元素在TRIP-HEAs中形成了更细小的等轴枝晶和更多的形变孪晶所产生的孪晶诱导塑性效应。
The effect of C and Mo alloying elements on the microstructure and mechanical properties of transformation-induced plasticity (TRIP) high-entropy alloys (HEAs, Fe50Mn30Co10Cr10) was systematically investigated. The results showed that the as-cast TRIP-HEA doped with 2 at.% C presents an excellent combination of high tensile strength (similar to 600 MPa) and high ductility (similar to 67.4%) owing to solid-solution strengthening. Surprisingly, the addition of 1 at.% Mo promotes the improvement in tensile strength (similar to 658 MPa) and significant increase in elongation (similar to 89.8%), which is much larger than that of the most reported as-cast HEAs. This is attributed to the formation of finer equiaxed dendrite grain and the twinning-induced plasticity effect with more deformation twins in TRIP-HEAs added by C and Mo elements.