铸造技术2026，Vol.47Issue(5)：537-546,10.DOI:10.16410/j.issn1000-8365.2026.5200
AlxCr10Fe53-xNi36Mo1双相多主元合金的凝固组织与冲击性能研究
Solidification Microstructures and Impact Toughness of AlxCr10Fe53-xNi36Mo1 Dual-Phase Multi-Principal Element Alloys
摘要
Abstract
FCC/B2 dual-phase multiprincipal element alloys combine high strength with good ductility,but their insufficient impact toughness under dynamic loading remains a key obstacle to engineering applications.To overcome this limitation,as-cast AlxCr10Fe53-xNi36Mo1(x=13,15,17 at.％)alloys with different phase volume fractions were designed and fabricated by tuning the Al/Fe ratio,with a size of φ100 mm×400 mm and a weight of 25 kg,aiming to establish composition-microstructure-property relationships.Microstructural characterization reveals that decreasing the Al/Fe ratio drives a transition from a regular lamellar eutectic structure(Al17)to a hypoeutectic microstructure with primary FCC dendrites(Al13)while simultaneously increasing the FCC phase fraction from 68.1％to 93.1％.In addition,the FCC/B2 interfacial density decreases and gradually deviates from the Kurdjumov-Sachs(K-S)orientation relationship.These structural changes significantly improve the mechanical response:the Al13 alloy achieves the most favourable balance,with a yield strength of 622 MPa,31.9％tensile ductility,and an impact energy of 19.62 J at room temperature.关键词
多主元合金/Charpy冲击/微观组织/力学性能/成分设计Key words
multi-principal element alloys(MPEAs)/Charpy impact toughness/microstructure/mechanical properties/composition design分类
矿业与冶金引用本文复制引用
严鹏,王志军,史新波,邱云基,何峰,李俊杰,王锦程..AlxCr10Fe53-xNi36Mo1双相多主元合金的凝固组织与冲击性能研究[J].铸造技术,2026,47(5):537-546,10.基金项目
国家自然科学基金面上项目(52471047) （52471047）
凝固技术全国重点实验室基金(2025-TS-06) （2025-TS-06）
