铸造2026，Vol.75Issue(4)：323-329,7.DOI:10.27014/j.cnki.zhuzao.2026.0046
热处理对定向凝固Ni36.5Co30Cr11Fe11Al6Ta1.5W4高熵合金组织及力学性能的影响
Effect of Heat Treatment on the Microstructure and Mechanical Properties of Directionally Solidified Ni36.5Co30Cr11Fe11Al6Ta1.5W4 High Entropy Alloys
摘要
Abstract
The effect of heat treatment process on the microstructure and mechanical properties of directionally solidified Ni36.5Co30Cr11Fe11Al6Ta1.5W4 high entropy alloy was studied using X-ray diffraction(XRD),scanning electron microscopy(SEM),and an electronic universal material testing machine.The results show that there is no interdendritic segregation in the alloy after solid solution treatment at 1 200℃for 2 h,and during aging process at 700℃,the TCP and L12 phases precipitate in the alloy;with increase of the aging time,the sizes of L12 phases increase while that of TCP phases did not change;with the increase of aging time,the yield strength of the alloy increases from 511 MPa to 597 MPa,which approaches the peak value of peroperty after aging for 8 h;the precipitation strengthening provided by L12 phase is the main reason for the increase of yield strength of the alloy.The relevant results provide some references for the performance control of directionally solidified high entropy alloys.关键词
定向凝固/高熵合金/L12相/热处理/力学性能/沉淀强化/TCP相/固溶处理/时效处理Key words
directional solidification/high entropy alloy/L12 phase/heat treatment/mechanical property/precipitation strengthening/TCP phase/solution treatment/aging treatment分类
矿业与冶金引用本文复制引用
刘桐,封涵文,高雪峰,王刚,秦刚,陈瑞润..热处理对定向凝固Ni36.5Co30Cr11Fe11Al6Ta1.5W4高熵合金组织及力学性能的影响[J].铸造,2026,75(4):323-329,7.基金项目
国家自然科学基金项目(52425401和52404357). （52425401和52404357）
