Effect of heat treatment on microstructure and mechanical properties of FeCrMnNiCox alloy
LI He-qi1, WANG Xiao-min1,2, ZENG Hong-yan1
1. Qinghai High Performance Light Metal Alloy and Deep Processing Engineering Technology Research Center, Key Laboratory of Qinghai Province for Light Alloy, Qinghai University, Xining 810016, China;
2. Department of Materials Science and Engineering, Yingkou Institute of Technology, Yingkou 115014, Liaoning, China
Abstract:FeCrMnNiCo, FeCrMnNiCo0.5 and FeCrMnNi alloys were prepared by vacuum melting and casting technology after metal powders was mixed by planetary ball mill. The effects of heat treatment temperature on the microstructures, tensile properties and hardness of three kinds of multi-principal alloys were studied by means of metallographic microscope, scanning electron microscopy (SEM), hardness tester and universal tensile testing machine. The results show that the hardness of FeCrMnNi alloy after heat treatment at 900 ℃ is the highest and the maximum hardness is 380HV. The plasticity of FeCrMnNiCo0.5 alloy is the largest after heat treatment at 700 ℃, and its elongation after fracture is 54.7%. At the same heat treatment temperature, with the increase of Co content, the alloys’ structure is changed from dendritic to honeycomb, and the alloys’ tensile strength is decreased. The hardness of the same alloy is increased with the increase of heat treatment temperature, which may be related to the increase of precipitates after heat treatment, but its tensile strength remains unchanged.
李和奇, 王晓民, 曾宏燕. 热处理对FeCrMnNiCox合金微观组织及力学性能的影响[J]. 材料工程, 2020, 48(6): 170-175.
LI He-qi, WANG Xiao-min, ZENG Hong-yan. Effect of heat treatment on microstructure and mechanical properties of FeCrMnNiCox alloy. Journal of Materials Engineering, 2020, 48(6): 170-175.
[1] YEH J W,LIN S J,CHIN T S,et al.Formation of simple crystal structures in Cu-Co-Ni-Cr-Al-Fe-Ti-V alloys with multiprincipal metallic elements [J].Metallurgical & Materials Transactions:A,2004,35(8):2533-2536.
[2] 高家诚,李锐.高熵合金研究的新进展[J].功能材料,2008,39(7):1059-1061. GAO J C,LI R.New progress in the study of high-entropy alloys[J].Journal of Functional Materials,2008,39(7):1059-1061.
[3] CHOU H P,CHANG Y S,CHEN S K,et al.Microstructure, thermophysical and electrical properties in AlxCoCrFeNi (0≤x≤2) high-entropy alloys[J].Materials Science & Engineering:B,2009,163(3):184-189.
[4] GALI A,GEORGE P.Tensile properties of high- and medium-entropy alloys[J].Intermetallics,2013,39(3):74-78.
[5] TANG Z,HUANG L,HE W,et al.Alloying and processing effects on the aqueous corrosion behavior of high-entropy alloys[J].Entropy,2014,16(2):895-911.
[6] 陈永星,朱胜,王晓明,等.高熵合金制备及研究进展[J].材料工程,2017,45(11):129-138. CHEN Y X,ZHU S,WANG X M,et al.Progress in preparation and research of high-entropy alloys[J].Journal of Materials Engineering,2017,45(11):129-138.
[7] GLUDOVATA B,HOHENWARTER A,CATOOR D,et al. A fracture-resistant high-entropy alloy for cryogenic applications [J].Science,2014,345(6201):1153-1158.
[8] HUI J,LI J,HAN K,et al.Effects of tungsten on microstructure and mechanical properties of CrFeNiV0.5Wx and CrFeNi2V0.5Wx high-entropy alloys[J].Journal of Materials Engineering & Performance,2015,24(12):4594-4600.
[9] 唐群华,蔡建宾,吴桂芬,等.热处理对Al0.5CoCrFeNiB0.2高熵合金组织结构及力学性能的影响[J].铸造,2011,60(12):24-27. TANG Q H,CAI J B,WU G F,et al.Effect of heat treatment on microstructure and mechanical properties of Al0.5CoCrFeNiB0.2 high-entropy alloy[J].Casting,2011,60(12):24-27.
[10] YEH J W,CHEN S K,LIN S J,et al.Nanostructured high-entropy alloys with multiple principal elements:novel alloy design concepts and outcomes[J].Advanced Engineering Materials,2004,6(5):299-303.
[11] MA S G,JIAO Z M,QIAO J W,et al.Strain rate effects on the dynamic mechanical properties of the AlCrCuFeNi2high-entropy alloy[J].Materials Science & Engineering:A,2016,649:35-38.
[12] HSU C Y,SHEU T S.Effect of iron content on wear behavior of AlCoCrFexMo0.5Ni high-entropy alloys [J].Wear,2010,268(5):653-659.
[13] 李青宇,李涤尘,张航,等. 激光熔覆沉积成形NbMoTaTi难熔高熵合金的组织与强度研究[J].航空制造技术,2018,61(10):60-66. LI Q Y,LI D C,ZHANG H,et al.Microstructure and strength of NbMoTaTi refractory high entropy alloy formed by laser cladding deposition[J].Aviation Manufacturing Technology,2018,61(10):60-66.
[14] 刘用,马胜国,刘英杰,等.AlxCrCuFeNi2多主元高熵合金的摩擦磨损性能[J].材料工程,2018,46(2):99-104. LIU Y,MA S G,LIU Y J,et al.Friction and wear properties of AlxCrCuFeNi2 multiprincipal high-entropy alloys[J].Journal of Materials Engineering,2018,46(2):99-104.
[15] 陈刚,王璐,杨静,等.Al0.1CoCrFeNi高熵合金的力学性能和变形机理[J].材料工程,2019,47(1):106-111. CHEN G,WANG L,YANG J,et al. Mechanical properties and deformation mechanisms of Al0.1CoCrFeNi high-entropy alloys[J].Journal of Materials Engineering,2019,47(1):106-111.
[16] 王重,林万明,马胜国,等.冷轧对Al10Cu25Co20Fe20Ni25高熵合金组织结构及力学性能的影响[J].材料工程,2015,43(8):50-55. WANG C,LIN W M,MA S G,et al.Effect of cold rolling on microstructure and mechanical properties of Al10Cu25Co20Fe20Ni25 high-entropy alloy [J].Journal of Materials Engineering,2015,43(8):50-55.
[17] LU Y,DONG Y,GUO S,et al.A promising new class of high-temperature alloys:eutectic high-entropy alloys[J].Scientific Reports,2014,4:6200.
[18] LU Y,GAO X,JIANG L,et al.Directly cast bulk eutectic and near-eutectic high entropy alloys with balanced strength and ductility in a wide temperature range[J].Acta Materialia,2017,124:143-150.
[19] MUNITZ A,SALHOV S,HAYUN S,et al.Heat treatment impacts the micro-structure and mechanical properties of AlCoCrFeNi high entropy alloy[J].Journal of Alloys & Compounds,2016,683:221-230.
[20] GAO J,DONG Z,REN H,et al.Microstructure evolution in an advanced 9Cr-1.5Mo-1Co-VNbBN alloy during heat treatment and high temperature aging[J].Steel Research International,2019,90(5):1800534.
[21] MUNITZ A,MESHI L,KAUFMAN M J.Heat treatments effects on the microstructure and mechanical properties of an equiatomic Al-Cr-Fe-Mn-Ni high entropy alloy[J].Materials Science and Engineering:A,2017, 689:384-394.
[22] 张博文,唐清秋,钟志宏.热处理对FeCrVTiMo高熵合金微观组织及力学性能的影响[J].热加工工艺,2018(14):223-226. ZHANG B W,TANG Q Q,ZHONG Z H.Effect of heat treatment on microstructure and mechanical properties of FeCrVTiMo high entropy alloy[J].Hot Working Process,2018(14):223-226.
[23] 孙永哲,田笑,魏亚风,等. 热处理对冷轧变形Al0.3CoCrFeNi高熵合金组织与力学性能的影响[J].材料热处理学报,2017,38(9):18-23. SUN Y Z,TIAN X,WEI Y F,et al.Effect of heat treatment on microstructure and mechanical properties of cold rolled Al0.3CoCrFeNi high entropy alloy[J].Journal of Material Heat Treatment,2017,38(9):18-23.
[24] 胡赓祥.材料科学基础[M].上海:上海交通大学出版社,2003. HU G X.Fundamentals of materials science[M].Shanghai:Shanghai Jiao Tong University Press,2003.
[25] QIAN M.In-situ observations of the dissolution of carbides in an Fe-Cr-C alloy[J].Scripta Materialia,1999,41(12):1301-1303.