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OA
Effect of Heat Treatment on the Microstructure and Mechanical Properties of Directionally Solidified Ni36.5Co30Cr11Fe11Al6Ta1.5W4 High Entropy Alloys
采用X射线衍射(XRD)、扫描电子显微镜(SEM)和电子万能材料试验机研究了热处理工艺对定向凝固Ni36.5Co30Cr11Fe11Al6Ta1.5W4高熵合金组织及力学性能的影响.结果表明,合金经1 200℃、2 h的固溶处理后枝晶间无偏析,在700℃时效过程中合金中析出了TCP相和L12相;随时效时间增加,L12相逐渐长大而TCP相尺寸没有较大变化,合金屈服强度由511 MPa提升至597 MPa,合金经8 h时效后性能接近峰值;L12相带来的沉淀强化是合金屈服强度提升的主要原因.相关结果为定向凝固高熵合金的性能调控提供一定的参考.
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.
刘桐;封涵文;高雪峰;王刚;秦刚;陈瑞润
哈尔滨工业大学 金属精密热加工国家重点实验室,黑龙江 哈尔滨 150001||中国科学院金属研究所 轻质高强材料研究部,辽宁 沈阳 110016中国科学院金属研究所 轻质高强材料研究部,辽宁 沈阳 110016哈尔滨工业大学 金属精密热加工国家重点实验室,黑龙江 哈尔滨 150001大连海泰轴承制造有限公司,辽宁 大连 116300哈尔滨工业大学 金属精密热加工国家重点实验室,黑龙江 哈尔滨 150001哈尔滨工业大学 金属精密热加工国家重点实验室,黑龙江 哈尔滨 150001
矿业与冶金
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
directional solidificationhigh entropy alloyL12 phaseheat treatmentmechanical propertyprecipitation strengtheningTCP phasesolution treatmentaging treatment
《铸造》 2026 (4)
323-329,7
国家自然科学基金项目(52425401和52404357).
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