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Microstructural Characterization of Mechanically Alloyed FeCoNiMnV High Entropy Alloy Consolidated by Spark Plasma Sintering
Advanced Engineering Materials ( IF 3.4 ) Pub Date : 2019-12-19 , DOI: 10.1002/adem.201901311 Fatemeh Alijani 1 , Mohsen Reihanian 1 , Khalil Gheisari 1 , Motohiro Yuasa 2 , Hiroyuki Miyamoto 2
Advanced Engineering Materials ( IF 3.4 ) Pub Date : 2019-12-19 , DOI: 10.1002/adem.201901311 Fatemeh Alijani 1 , Mohsen Reihanian 1 , Khalil Gheisari 1 , Motohiro Yuasa 2 , Hiroyuki Miyamoto 2
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The microstructure and phase evolution of the mechanically alloyed FeCoNiMnV high entropy alloy during spark plasma sintering are examined. The milled powders are sintered at different temperatures ranging between 500 °C and 1000 °C. A multiphase structure is produced during the sintering process. The produced alloy experiences different types of decompositions and phase formations as the sintering temperature is raised. During sintering at different temperatures, the body centered cubic and face centered cubic (FCC) phases are transformed to new FCC and tetragonal phases. According to the results, V does not show the tendency to dissolve into the structure and the tetragonal phases, mainly composed of V and Mn, tending to be formed in addition to the FCC solid solution. Sintering at 900 °C results in the grain size of about 220 nm, attaining the highest hardness of about 450 HV. The sintered alloy at 1000 °C shows the highest relative density (about 98%) with an average grain size of about 580 nm. The phase formation is predicted and evaluated by different criteria, and the consistency between the theoretical and experimental results is explained.
中文翻译：
机械合金化的FeCoNiMnV高熵合金的放电等离子烧结凝固组织
研究了在电火花等离子烧结过程中机械合金化的FeCoNiMnV高熵合金的显微组织和相演变。研磨后的粉末在500°C至1000°C的不同温度下烧结。在烧结过程中产生多相结构。随着烧结温度的升高，产生的合金经历不同类型的分解和相形成。在不同温度下的烧结过程中，体心立方和面心立方（FCC）相转变为新的FCC相和四方相。根据结果，V没有显示出溶解到结构中的趋势，并且除了FCC固溶体之外，还倾向于形成主要由V和Mn组成的四方相。在900°C下烧结，晶粒尺寸约为220 nm，达到约450 HV的最高硬度。烧结合金在1000°C时显示出最高的相对密度（约98％），平均晶粒尺寸约为580 nm。通过不同的标准来预测和评估相的形成，并解释理论和实验结果之间的一致性。
更新日期：2019-12-19
中文翻译：
机械合金化的FeCoNiMnV高熵合金的放电等离子烧结凝固组织
研究了在电火花等离子烧结过程中机械合金化的FeCoNiMnV高熵合金的显微组织和相演变。研磨后的粉末在500°C至1000°C的不同温度下烧结。在烧结过程中产生多相结构。随着烧结温度的升高，产生的合金经历不同类型的分解和相形成。在不同温度下的烧结过程中，体心立方和面心立方（FCC）相转变为新的FCC相和四方相。根据结果，V没有显示出溶解到结构中的趋势，并且除了FCC固溶体之外，还倾向于形成主要由V和Mn组成的四方相。在900°C下烧结，晶粒尺寸约为220 nm，达到约450 HV的最高硬度。烧结合金在1000°C时显示出最高的相对密度（约98％），平均晶粒尺寸约为580 nm。通过不同的标准来预测和评估相的形成，并解释理论和实验结果之间的一致性。
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