热处理对AlCrFeNiTi高熵合金组织和硬度的影响
发布时间：2018-08-19 17:30
【摘要】：在氩气保护下用真空电弧炉制备了AlCrFeNiTi高熵合金,采用X射线衍射仪、金相显微镜和维氏硬度计等研究了加热温度、保温时间和冷却方式对AlCrFeNiTi高熵合金组织和硬度的影响。结果表明,铸态AlCrFeNiTi高熵合金由两个体心立方结构固溶体构成,形成了由枝晶、枝晶间和α+β共晶组织组成的典型高熵合金枝晶组织。随着加热温度的升高,合金枝晶相先粗化,当温度升至900℃时再细化;随着保温时间增加和冷却速度减慢,枝晶组织和共晶组织均粗化,而合金硬度呈上升趋势。合金经过热处理后的硬度取决于枝晶相含量和形貌,在高速冷却方式下残余内应力对合金的硬度也起关键作用。
[Abstract]:AlCrFeNiTi high entropy alloy was prepared by vacuum arc furnace under argon protection. The effects of heating temperature, holding time and cooling mode on the microstructure and hardness of AlCrFeNiTi high entropy alloy were studied by X-ray diffractometer, metallographic microscope and Vickers hardness tester. The results show that the as-cast AlCrFeNiTi high entropy alloy is composed of two solid solutions with a body-centered cubic structure, forming a typical high-entropy alloy dendritic structure consisting of dendrite, interdendritic and 伪 尾 eutectic structure. With the increase of heating temperature, the dendritic phase of the alloy first coarsened, and then refined when the temperature rose to 900 鈩，
本文编号：2192336
[Abstract]:AlCrFeNiTi high entropy alloy was prepared by vacuum arc furnace under argon protection. The effects of heating temperature, holding time and cooling mode on the microstructure and hardness of AlCrFeNiTi high entropy alloy were studied by X-ray diffractometer, metallographic microscope and Vickers hardness tester. The results show that the as-cast AlCrFeNiTi high entropy alloy is composed of two solid solutions with a body-centered cubic structure, forming a typical high-entropy alloy dendritic structure consisting of dendrite, interdendritic and 伪 尾 eutectic structure. With the increase of heating temperature, the dendritic phase of the alloy first coarsened, and then refined when the temperature rose to 900 鈩，
本文编号：2192336
本文链接：https://www.wllwen.com/kejilunwen/jiagonggongyi/2192336.html
