铸造技术2024，Vol.45Issue(2)：99-113,15.DOI:10.16410/j.issn1000-8365.2024.3307
低层错能CrCoNi基(中)高熵合金的强化方法研究
Research Progress on Strengthening Methods for CrCoNi-based Medium-or High-entropy Alloys with Low Stacking Fault Energy
摘要
Abstract
CrCoNi-based medium-or high-entropy alloys with low stacking fault energy have excellent fracture toughness at room temperature or low temperature.Moreover,under impact conditions,the variety of deformation mechanisms imparts excellent deformation ability to CrCoNi-based medium-or high-entropy alloys,which can be used as impact-resistant structural materials in extreme environments.However,the dilemma of"strength-plasticity"in metallic materials is still observed in CrCoNi-based medium-or high-entropy alloys,and the low yield strength limits the potential application of CrCoNi-based medium-or high-entropy alloys.Therefore,selecting appropriate strengthening methods to improve the yield strength of CrCoNi-based medium-or high-entropy alloys while maintaining their high plasticity has become a hotspot in the research of high-entropy alloys at present.This article introduced the strengthening methods currently applied in CrCoNi-based medium-or high-entropy alloys from three aspects:solid element,lattice defects,and phase structure.Various strengthening and toughening mechanisms,such as solid solution elements,interstitial atoms,dislocations,twinning,phase transformations,and gradient structures,were reviewed.By learning from the deformation mechanisms of CrCoNi-based medium-or high-entropy alloys,the different strengthening mechanisms and their impact on the increase in mechanical properties were analysed,providing ideas for the design of high-strength and high-toughness alloys with low stacking fault energy.关键词
CrCoNi基(中)高熵合金/低层错能/变形机理/强化方法Key words
CrCoNi-based medium-or high-entropy alloys/low stacking fault energy/deformation mechanisms/strengthening methods分类
矿业与冶金引用本文复制引用
张琳冰,王军,闫娜,李泽洲,余雨宸,张帆,王琳,程兴旺..低层错能CrCoNi基(中)高熵合金的强化方法研究[J].铸造技术,2024,45(2):99-113,15.基金项目
科技基础加强计划(6142902210104) （6142902210104）
凝固技术国家重点实验室开放课题(SKLSP202301) （SKLSP202301）
北京理工大学学术启动计划(3090012222205) （3090012222205）
海外高层次青年人才计划(3090012222302) （3090012222302）
冲击环境材料技术国家级重点实验室基金(WDZC2022-1) （WDZC2022-1）
