Microstructure and properties of a refractory high-entropy alloy after cold working
Microstructure and properties of a refractory high-entropy alloy after cold working
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DOI：
10.1016/j.jallcom.2015.07.209
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发表时间：
2015-11-15
影响因子：
6.2
通讯作者：
Semiatin, S. L.
中科院分区：
文献类型：
--
作者：
Senkov, O. N.;Semiatin, S. L.
在室温下成功地轧制了一种高熵的高温合金HfNbTaTiZr，其厚度压下率高达86.4%（真厚度应变为-2.3）。这代表了首次成功地尝试冷轧具有BCC晶体结构的HEA。在轧制状态下以及在800 ℃、1000 ℃和1200 ℃退火后测定轧制板的显微组织和性能。冷轧导致广泛的晶粒伸长，在晶粒内的变形带的形成，和依赖于轧制压下量的晶体织构的发展。86.4%冷轧板的真实拉伸应力为1295 MPa，拉伸延展性为4.7%。在1000 ℃和1200 ℃退火后，冷轧板发生完全再结晶。在1000 ℃退火后，板材的真实拉伸应力和延展性分别为1262 MPa和9.7%。(C)2015爱思唯尔B. V.保留所有权利。
A refractory high-entropy alloy HfNbTaTiZr was successfully rolled at room temperature up to 86.4% reduction in thickness (true thickness strain is -2.3). This represents the first successful attempt to cold roll a HEA with a BCC crystal structure. The microstructure and properties of the rolled sheets were determined in the as-rolled condition and after annealing at 800 degrees C, 1000 degrees C, and 1200 degrees C. Cold rolling resulted in extensive grain elongation, formation of deformation bands within the grains, and development of crystallographic textures that depended on the rolling reduction. The 86.4% cold-rolled sheet had true tensile stress of 1295 MPa and tensile ductility of 4.7%. After annealing at 1000 degrees C and 1200 degrees C, complete recrystallization of the cold-rolled sheet occurred. After annealing at 1000 degrees C, the true tensile stress and ductility of the sheet were 1262 MPa and 9.7%, respectively. (C) 2015 Elsevier B.V. All rights reserved.