【摘要】 研究高熵合金Al_0.1CoCrFeNi在真空、空气和不同压力氢气中拉伸时,环境对合金力学性能的影响.研究结果表明:当Al_0.1CoCrFeNi合金在空气和氢气环境中拉伸时,少量氢原子进入合金后对其延伸率存在明显的改善作用;随着拉伸环境中氢气压力的增加,合金的延伸率随之提高,而当氢气压力大于0.010 MPa后,合金延伸率的提升速率明显减缓;在3种环境中拉伸时,合金的断口形貌均为韧窝状塑性断口,且在断口存在微孔洞.更多还原

【Abstract】 Effects of the environment on mechanical properties of Al_0.1CoCrFeNi alloy when tested in vacuum, air and gaseous hydrogen at different pressures were investigated. The result shows that a few hydrogen atoms can significantly improve elongation of the Al_0.1CoCrFeNi alloy when tested in air and gaseous hydrogen. The elongation of Al_0.1CoCrFeNi alloy increases with the increase of pressure of gaseous hydrogen. The increase rate of elongation becomes slower when the pressure of gaseous hydrogen is more than 0.010 MPa. Fractographs of Al_0.1CoCrFeNi alloy exhibits all transgranular fracture patterns. Some micro-voids exist on the fractograph surfaces when tensile test is performed in three environments.更多还原