Microstructure and Mechanical Properties of Novel Lightweight TaNbVTi-Based Refractory High Entropy Alloys.
Microstructure and Mechanical Properties of Novel Lightweight TaNbVTi-Based Refractory High Entropy Alloys.
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新型轻质TaNbVTi基难熔高熵合金的显微组织和力学性能
DOI：
10.3390/ma15010355
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发表时间：
2022-01-04
期刊：
影响因子：
--
通讯作者：
Xu S
中科院分区：
文献类型：
--
作者：
Fu A;Cao Y;Liu Y;Xu S
采用球磨和放电等离子烧结法制备了一系列新型轻质tanbvti基耐火高熵合金（RHEA）。由于Al2O3陶瓷颗粒的引入，原位形成了增强相。含有15% Al2O3的RHEA具有高抗压屈服强度（1837 MPa）和低密度（7.75 g/cm3），并具有良好的延性保持。与未添加Al2O3的RHEA相比，其屈服强度和密度分别提高了32%和15%。该合金的比屈服强度（237 MPa cm3/g）远高于已有报道的其他合金，其主要原因是高体积分数Al2O3添加剂的加入导致了合金的固溶强化和沉淀强化。同时，塑性基体具有良好的抗压塑性。
A series of novel lightweight TaNbVTi-based refractory high entropy alloys (RHEA) were fabricated through ball-milling and spark plasma sintering (SPS). The reinforced phase of TiO precipitates were in-situ formed due to the introduction of Al2O3 ceramic particles. The RHEA with 15% Al2O3 exhibits a high compressive yield strength (1837 MPa) and a low density (7.75 g/cm3) with an adequate ductility retention. The yield strength and density are 32% higher and 15% lower, respectively, compared to the RHEA without Al2O3 addition. The specific yield strength (237 MPa cm3/g) of the RHEAs is much higher than that of other reported RHEAs, and is mainly ascribed to the introduction of high volume fraction of Al2O3 additives, resulting in solid solution strengthening and precipitation strengthening. Meanwhile, the ductile matrix is responsible for the good compressive plasticity.
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影响因子：
9.4
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