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Novel Multicomponent Powders from the AlCrFeMnMo Family Synthesized by Mechanical Alloying
Advanced Engineering Materials ( IF 3.4 ) Pub Date : 2019-10-07 , DOI: 10.1002/adem.201900808 Tomasz Stasiak 1 , Surya Nilamegam Kumaran 1 , Matthieu Touzin 1 , Franck Béclin 1 , Catherine Cordier 1
Advanced Engineering Materials ( IF 3.4 ) Pub Date : 2019-10-07 , DOI: 10.1002/adem.201900808 Tomasz Stasiak 1 , Surya Nilamegam Kumaran 1 , Matthieu Touzin 1 , Franck Béclin 1 , Catherine Cordier 1
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High‐entropy alloys (HEAs) and multicomponent alloys are known for their promising properties and the almost infinite possibilities of the design of new compositions. The Al–Cr–Fe–Mn–Mo family of HEAs is chosen to promote the formation of a body‐centered cubic (bcc) structure that exhibits high hardness and yield strength. Powder metallurgy is preferred to the liquid route to avoid segregation problems. Two compositions of alloyed powder, equiatomic and optimized, are successfully prepared by mechanical alloying. X‐ray diffraction (XRD) indicates the formation of two major bcc phases: bcc#1 (a1 = 3.13–3.14 Å) and bcc#2 (a2 = 2.87–2.94 Å). Energy transferred during milling depends greatly on the milling device and process conditions. Scanning electron microscopy–energy‐dispersive X‐ray spectroscopy (SEM–EDX) images reveal that high‐energy shocks of balls enable to elaborate homogeneous powder with controlled Fe contamination coming from the grinding vial and balls, whereas low‐energy shocks enable to produce powder free of contamination by Fe, with heterogeneous particles. Finally, the milling process is optimized to obtain a homogeneous alloyed powder with as little contamination as possible.
中文翻译：
机械合金化合成AlCrFeMnMo族新型多组分粉末
高熵合金（HEA）和多组分合金以其有前途的性能以及设计新成分的可能性几乎无限而闻名。选择HEA的Al-Cr-Fe-Mn-Mo族以促进形成具有高硬度和屈服强度的体心立方（bcc）结构。粉末冶金比液体冶金更可避免偏析问题。通过机械合金化成功制备了两种合金粉末，等原子的和优化的。X射线衍射（XRD）表示形成了两个主要的bcc相：bcc＃1（a 1 = 3.13–3.14Å）和bcc＃2（a 2 = 2.87–2.94Å）。研磨过程中传递的能量在很大程度上取决于研磨设备和工艺条件。扫描电子显微镜–能量色散X射线能谱（SEM–EDX）图像显示，球的高能冲击能够形成精细的均质粉末，而受控的Fe污染来自研磨瓶和球，而低能冲击则能够产生不含铁污染的粉末，具有非均质颗粒。最后，对研磨工艺进行了优化，以获得具有尽可能少的污染的均质合金粉末。
更新日期：2019-10-07
中文翻译：
机械合金化合成AlCrFeMnMo族新型多组分粉末
高熵合金（HEA）和多组分合金以其有前途的性能以及设计新成分的可能性几乎无限而闻名。选择HEA的Al-Cr-Fe-Mn-Mo族以促进形成具有高硬度和屈服强度的体心立方（bcc）结构。粉末冶金比液体冶金更可避免偏析问题。通过机械合金化成功制备了两种合金粉末，等原子的和优化的。X射线衍射（XRD）表示形成了两个主要的bcc相：bcc＃1（a 1 = 3.13–3.14Å）和bcc＃2（a 2 = 2.87–2.94Å）。研磨过程中传递的能量在很大程度上取决于研磨设备和工艺条件。扫描电子显微镜–能量色散X射线能谱（SEM–EDX）图像显示，球的高能冲击能够形成精细的均质粉末，而受控的Fe污染来自研磨瓶和球，而低能冲击则能够产生不含铁污染的粉末，具有非均质颗粒。最后，对研磨工艺进行了优化，以获得具有尽可能少的污染的均质合金粉末。
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