材料科学与工程学报2012，Vol.30Issue(3)：422-427,6.
淬火温度对Al_（0.5）CoCrFeNiSi_（0.2）高熵合金组织结构的影响
Effect of Quenching Temperature on the Microstructure of High-entropy Al0.5CoCrFeNiSi0.2 Alloy
摘要
Abstract
High-entropy Al0.5CoCrFeNiSi0.2 alloy was prepared by the arc melting and casting method.As-cast alloy was heated at 600℃-1 100℃ for 10h and subsequently quenched into water.Microstructure of the alloy was characterized by optical microscopy（OM）,scanning electron microscopy（SEM）,X-ray energy-dispersive spectrometry（EDS）,X-ray diffractometry（XRD） and transmission electron microscopy（TEM）.Hardness of the alloy was measured by a Vickers hardness tester.The results showed that the microstructures of as-cast and as-quenched alloy exhibited typical dendrite and inter-dendrite structures.Dendrites contained an amorphous phase and nano-scale precipitates.When the quenching temperature is lower than 800℃,the hardness of the as-quenched alloy increased with increasing quenching temperature,this can be attributed to dendrite refinement,inter-dendrite phase increase and decrease of the fcc phase.When the quenching temperature is higher than 900℃,the dendrite phase grew up,the fcc phase increased and a Ni-Al rich phase precipitated in the dendrites,which resulted in the hardness of alloy to decrease.关键词
高熵合金/淬火温度/微观组织Key words
high-entropy alloy/quenching temperature/microstructure分类
矿业与冶金引用本文复制引用
吴桂芬,唐群华,柯跃前,戴品强,吴波..淬火温度对Al_（0.5）CoCrFeNiSi_（0.2）高熵合金组织结构的影响[J].材料科学与工程学报,2012,30(3):422-427,6.基金项目
国家自然科学基金资助项目 （）
