The BCC/B2 Morphologies in AlxNiCoFeCr High-Entropy Alloys

By Yue Ma, Beibei Jiang, Chunling Li, Qing Wang, Chaofang Dong, P. K. Liaw, Fen Xu, Lixian Sun. 2017

168 citations recorded by the source corpus.

The present work primarily investigates the morphological evolution of the body-centered-cubic (BCC)/B2 phases in AlxNiCoFeCr high-entropy alloys (HEAs) with increasing Al content. It is found that the BCC/B2 coherent morphology is closely related to the lattice misfit between these two phases, which is sensitive to Al. There are two types of microscopic BCC/B2 morphologies in this HEA series: one is the weave-like morphology induced by the spinodal decomposition, and the other is the microstructure of a spherical disordered BCC precipitation on the ordered B2 matrix that appears in HEAs with a much higher Al content. The mechanical properties, including the compressive yielding strength and microhardness of the AlxNiCoFeCr HEAs, are also discussed in light of the concept of the valence electron concentration (VEC).

Subfields: Aerospace Engineering, Mechanical Engineering

View Paper: https://www.semanticscholar.org/paper/d03782a96a0523d7df3f6e4546fb8eb491af181f

How researchers see this paper

The researchers whose trusted networks rank it highest, strongest advocate first. Every researcher gets a different order.

In Aerospace Engineering

1. Yue Ma
2. T. Nieh
3. Chaofang Dong

In Mechanical Engineering

1. T. Nieh
2. Yue Ma
3. Chunling Li
4. Chaofang Dong
5. Beibei Jiang
6. C. A. Schuh
7. Weihua Wang

Citations in the corpus

• Controlled formation of coherent cuboidal nanoprecipitates in body-centered cubic high-entropy alloys based on Al2(Ni,Co,Fe,Cr)14 compositions (2018, background): “7) might be attributable to a high lattce misift [31,35].”
• Evaluation of microstructure and mechanical property variations in AlxCoCrFeNi high entropy alloys produced by a high-throughput laser deposition method (2017, background): “Figure 3f, obtained from the interdendritic region for the same composition, shows a weave-like structure typical of spinodal decomposition, consistent with prior observations [14].”