ABSTRACT The effect of continuously varying aluminium with a low content (x = 0.1–0.5) on as-cast AlxNbTiVZr high entropy alloys (HEAs) was studied. AlxNbTiVZr (x = 0.1, 0.2) HEAs showed a single BCC phase, while some lamellar second phases precipitated along the grain boundaries in AlxNbTiVZr (x = 0.3, 0.4, 0.5) alloys. With the increase in Al percentage, the compressive strength of AlxNbTiVZr HEAs increased from 1452 to 1667 MPa, whereas their ductility decreased from 19.40 to 6.15%. Notably, the AlxNbTiVZr HEAs showed both a higher specific yielding strength and considerable plastic strain than other Nb-Ti-V-X-Y HEAs and commercial Mg-, Ti-, and Ni-based alloys. Finally, the fracture morphologies of AlxNbTiVZr (x = 0.1–0.2) HEAs showed some features of compression ductility.

中文翻译：

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高比强度铸态AlxNbTiVZr高熵合金的研究

摘要 研究了连续变化的低含量铝 (x = 0.1–0.5) 对铸态 AlxNbTiVZr 高熵合金 (HEAs) 的影响。AlxNbTiVZr (x = 0.1, 0.2) HEAs 显示出单一的 BCC 相，而一些层状第二相沿 AlxNbTiVZr (x = 0.3, 0.4, 0.5) 合金的晶界析出。随着Al含量的增加，AlxNbTiVZr HEAs的抗压强度从1452 MPa增加到1667 MPa，而它们的延展性从19.40%下降到6.15%。值得注意的是，与其他 Nb-Ti-VXY HEAs 和商业镁、钛和镍基合金相比，AlxNbTiVZr HEAs 显示出更高的比屈服强度和相当大的塑性应变。最后，AlxNbTiVZr (x = 0.1–0.2) HEAs 的断裂形貌显示出一些压缩延展性特征。