论文标题
tivnbta耐火性高渗透合金的脆性转变过渡
On the Brittle-to-Ductile Transition of the As-cast TiVNbTa Refractory High-entropy Alloy
论文作者
论文摘要
在10-3 s-1的应变率下，研究了使用从-139C至20C的四点弯曲测试研究了AS-Cast TivNBTA的断裂特性。从这些测试和分裂学中，获得了条件断裂韧性值和脆性转化温度。脆性到脱糊性的过渡温度在-47C至-27C之间，对于合金，估计的活化能值为0.52+-0.09 eV。这项研究提供了对相对延展性趋势中错位运动性质的初步理解。
The fracture properties of as-cast TiVNbTa, a refractory high-entropy alloy (RHEA), were investigated using four-point bending tests from -139C to 20C under a strain-rate of 10-3 s-1. From those tests and fractography, the conditional fracture toughness values and the brittle-to-ductile transition temperature were obtained. The brittle-to-ductile transition temperature was between -47C to -27C, which gives an estimated activation energy value of 0.52+-0.09 eV for the alloy. This study provides a preliminary understanding of the nature of dislocation motion in a relatively ductile RHEA.
