本文将高熵合金的制备扩展到机械合金化工艺,制备体系为等摩尔比CoCrFeNiCuAl和CoCrFeNiTiAl合金。CoCrFeNiCuAl合金粉体在球磨18h即开始发生固溶反应,42h球磨合金X射线中只有最强的单衍射峰可见,合金主晶相为BCC结构固溶体, 同时包含FCC结构固溶体、单质纳米晶和非晶相。经过加热处理,粉体中的组元扩散进一步被激活,过...
Besides, we have performed a high-temperature mechanical characterization of the CoCrFeNiAl 0.225 Ti 0.15 HEA. The experimental data have revealed that the material's strength continuously declines with stretching temperature, opposed to that of toughness. The high-temperature tensile modulus of ...
本文同时研究了Al含量对CoCrFeNiTiAl系高熵合金相组成,微观结构和性能的影响.加入Al之后,合金的主晶相由FCC结构变为BCC结构,BCC相可以鉴定由NiAl金属间化合物基固溶体,(α-Fe,Cf)固溶体和含多种元素的BCC固溶体组成.随着Al含量的增加,合金中BCC固溶体结构趋于稳定,Al含量大于x=1.0时,合金仅由BCC结构固溶体组成...
corrosion resistant coatinghigh-entropy alloypassive filmplasma claddingThe superior corrosion resistance of high-entropy alloys (HEA) has attracted much attention from researchers in recent years. In this study, with minor additions of passivation elements into a CoCrFeNi matrix, a (CoCrFeNi) 94 ...
CoCrFeNiTiAl x ( x values in molar ratio, x = 0, 0.5, 1.0, 1.5 and 2.0) high-entropy alloys were prepared using a vacuum arc melting method. The effects of Al addition on microstructure and mechanical properties were investigated. The results show that only a face-centered cubic (FCC)...
Vacuum diffusion bonding of high-entropy Al0.85CoCrFeNi alloy to TiAl intermetallicdoi:10.1016/j.jmatprotec.2019.116455Y. LeiS.P. HuT.L. YangX.G. SongY. LuoG.D. WangElsevier
To explore their potential engineering application in high temperature structures, the microstructure evolution of bonding interface, the elemental diffusion behavior and mechanical property of the diffusion bonded joint between AlCoCrFeNi2.1 eutectic high entropy alloy (EHEA) and TiAl alloy were ...
The coating treated with AlCoCrFeNi pre-diffusion demonstrated even greater oxidation resistance. It was found that the AlCoCrFeNi high entropy alloy coating effectively protected the TiAl alloy from degeneration for up to 100h at 900掳C.Yuanyuan Sun...
Annealing demonstrates no obvious influence on the main phase and elemental segregation of CoCrFeNiTiAl x alloys except for alloys with low Al content ( x=0, 0.5 and 1.0) contain more intermetallic compounds after annealing. The phase formation rules of high-entropy alloys is explored in this ...
Zhang KB, Fu ZY (2012) Effects of annealing treatment on properties of CoCrFeNiTiAl x multi-component alloys. Intermetallics 28:34–39. : 10.1016/j.intermet.2012.03.059Zhang, K.B., Fu, Z. (2012) Effects of annealing treatment on properties of CoCrFeNiTiAlx ...