摘要
The effect of deformation resistance of AlCr_(1.3)TiNi_(2) eutectic high-entropy alloys under various current densities and strain rates was investigated during electrically-assisted compression.Results show that at current density of 60 A/mm^(2) and strain rate of 0.1 s^(−1),the ultimate tensile stress shows a significant decrease from approximately 3000 MPa to 1900 MPa with reduction ratio of about 36.7%.However,as current density increases,elongation decreases due to intermediate temperature embrittlement.This is because the current induces Joule effect,which then leads to stress concentration and more defect formation.Moreover,the flow stress is decreased with the increase in strain rate at constant current density.
研究了不同电流密度和应变速率下AlCr_(1.3)TiNi_(2)共晶高熵合金在电辅助压缩过程中抗变形性能的影响。结果表明:当电流密度为60 A/mm^(2),应变速率为0.1 s^(−1)时,抗拉伸强度显著降低,从约3000 MPa降至1900 MPa,降幅约36.7%。然而,随着电流密度的增加,由于中温脆性延伸率下降,这是由于电流引起的焦耳效应导致应力集中,缺陷形成增加。在恒定电流密度下,流变应力随应变速率的增大而减小。
出处
《稀有金属材料与工程》
北大核心
2025年第5期1121-1126,共6页
Rare Metal Materials and Engineering
基金
National Natural Science Foundation of China(52305349)
Heilongjiang Touyan Team(HITTY-20190036)
Heilongjiang Provincial Natural Science Foundation of China(LH2023E033)
CGN-HIT Advanced Nuclear and New Energy Research Institute(CGN-HIT202305)
Natural Science Basic Research Program of Shaanxi Province(2023-JC-QN-0518)。
