Publications
Influence of alloying and aging treatment on the strain hardening behavior of non-equiatomic CoCrFeNi high entropy alloy
Influence of alloying and aging treatment on the strain hardening behavior of non-equiatomic CoCrFeNi high entropy alloy
Authors: Bushra Harun a, E-Wen Huang b c, Yao-Jen Chang c d, An-Chou Yeh c d, Jayant Jain a, Suresh Neelakantan
Faculty Associated
Jayant Jain , Suresh Neelakantan
Polarity dependent surface charge retention on CYTOP fluoropolymer for durable TENG applications
Faculty Associated
Ankur Goswami
In silico investigation of anisotropy in the mechanism of plastic activities during nanoscratch of nickel: a molecular dynamics study
Authors: Vamsi K Majeti, Devendra K Dubey, Jayant Jain
Publication date: 2025/3/6
Journal: Molecular Simulation
Pages: 1-15
Publisher: Taylor & Francis
Faculty Associated
Prof. Jayant Jain
Effect of Mg content on the aging behaviour and tensile properties of squeeze-cast Al-7Si-xMg alloys (x = 0–0.8 wt. %)
Authors
Karthik Kumar, L Hughes, U Mahmud, YL Chiu, IP Jones, R Lakshmi Narayan, Jayant Jain
Abstract
The present study investigates the effect of Mg addition on the aging and tensile behaviour of squeeze cast Al-7Si-(x)Mg alloys (x = 0–0.8 wt. %). The results show that increasing Mg content leads to a significant enhancement in the peak hardness of the alloys, with the maximum hardness of 149 HV observed for the Al-7Si-0.8Mg alloy after aging for 10 h. Additionally, the study reveals that Mg addition delays the aging kinetics, likely due to the interplay between the optimized number density and size of the precipitates, which require longer aging times to reach their optimal size for maximum strengthening. The tensile strength of the alloys increases with higher Mg content, with the peak-aged Al-7Si-0.8Mg alloy achieving a tensile strength of 337 MPa. The increase in hardness and strength with increasing Mg addition is attributed to the higher number of Mg2Si precipitates formed during aging which hinder dislocation movement. The yield strength of all alloys was predicted using the standard strengthening formula, showing that precipitation strengthening contributes the maximum to the overall yield strength for all the alloys, followed by solid solution strengthening. The present study also reveals the presence of both the βʺ and the β precipitates in the peak-aged samples, suggesting a combined strengthening effect from both precipitates.
Faculty Associated
Prof. Jayant Jain, Prof. R Lakshmi Narayan
