AlCoCrFe1.5Ni高熵合金的显微组织与性能
Microstructure and Properties of AlCoCrFe1.5Ni High Entropy Alloy
摘 要
采用水冷铜坩埚真空感应悬浮熔炼工艺制备AlCoCrFe1.5Ni高熵合金, 然后分别在800,900,1 000 ℃下对其进行退火热处理, 研究了退火前后合金的显微组织、硬度和耐蚀性能。结果表明: 退火前AlCoCrFe1.5Ni高熵合金为BCC结构, 组织为典型的等轴晶; 在800 ℃退火后, 合金中有FCC相和σ相析出; 在1 000 ℃退火后, 析出相为BCC相和FCC相, 无σ相; 在低于900 ℃的温度下退火后, 合金具有较好的抗高温软化性能, 在1 000 ℃退火后硬度下降明显, 由退火前的510 HV降至400 HV; 退火前后合金的耐蚀性能均优于304不锈钢的, 随着退火温度升高, 合金的耐蚀性能逐渐增强; 在1 000 ℃退火后, 合金的耐蚀性能优于904不锈钢的。
退火
显微组织
耐蚀性能
high entropy alloy
annealing
microstructure
corrosion resistance
Abstract
A high entropy alloy was prepared by water cooled copper crucible vacuum induction levitation melting, and then annealing heat treatment of the alloy was carried out at 800 ℃, 900 ℃ and 1 000 ℃; Microstructure, hardness and corrosion resistance of the alloy before and after annealing were studied. The results show that, before annealing, the alloy was composed of a single BCC structure and its microstructure was made up of typical equiaxed grain. There were FCC and σ phases precipitated after annealing at 800 ℃. After annealing at 1 000 ℃, the precipitates were BCC and FCC phases, and there was no σ phase. The resistance to high temperature softening of the alloy was good after annealing below 900 ℃, the hardness of the alloy decreased obviously from 518 HV to 400 HV after annealing at 1 000 ℃. The corrosion resistance of the alloy before and after annealing was better than that of 304 stainless steel. With the increase of annealing temperature, the corrosion resistance of the alloy increased gradually. After annealing at 1 000 ℃, the corrosion resistance of the alloy was better than that of 904 stainless steel.
中图分类号 TG113 DOI 10.11973/jxgccl201610013
所属栏目 材料性能及应用
基金项目 国家自然科学基金资助项目(50971043, 51171046); 教育部高等学校博士学科点专项科研基金自助项目(20133514110006); 福建省自然科学基金资助项目(2014J01176)
收稿日期 2015/7/10
修改稿日期 2016/7/18
网络出版日期
作者单位点击查看
备注刘灯宪(1991-), 男, 福建泉州人, 硕士研究生。
引用该论文: LIU Deng-xian,PENG Qiong,WU Bo,YANG Shang-jin,ZHAO Chun-feng,TOU Shu-shi,CHEN Zu-hua. Microstructure and Properties of AlCoCrFe1.5Ni High Entropy Alloy[J]. Materials for mechancial engineering, 2016, 40(10): 55～59
刘灯宪,彭 琼,吴 波,杨上金,赵春凤,钭舒适,陈祖华. AlCoCrFe1.5Ni高熵合金的显微组织与性能[J]. 机械工程材料, 2016, 40(10): 55～59
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【3】ZHANG Y, ZUO T T, TANG Z, et al. Microstructures and properties of high-entropy alloys［J］. Progress in Materials Science, 2013, 61: 1-93.
【4】GLUDOVATZ B, HOHENWARTER A, CATOOR D, et al. A fracture-resistant high-entropy alloy for cryogenic applications［J］. Science, 2014, 345(6201): 1153-1158.
【5】陈敏, 刘源, 李言祥,等. 多主元高熵合金AlTiFeNiCuCrx微观结构和力学性能［J］. 金属学报, 2007, 43(10): 1020-1024.
【6】TSAI K Y, TSAI M H, YEH J W. Sluggish diffusion in Co-Cr-Fe-Mn-Ni high-entropy alloys［J］. Acta Materialia, 2013, 61: 4887-4897.
【7】ZHU J M, FU H M, ZHANG H F, et al. Microstructures and compressive properties of multicomponent AlCoCrFeNiMox alloys［J］. Materials Science and Engineering, 2010, 527: 6975-6979.
【8】CHUANG M H, TSAI M H, WANG W R, et al. Microstructure and wear behavior of AlxCo1.5CrFeNi1.5Tiy high-entropy alloys［J］. Acta Materialia, 2011, 59: 6308-6317.
【9】KAO Y F, LEE T D, CHEN S K, et al. Electrochemical passive properties of AlxCoCrFeNi (x=0, 0.25, 0.50, 1.00) alloys［J］. Corrosion Science, 2010, 52: 1026-1034.
【10】WEN L H, KOU H C, LI J S, et al. Effect of aging temperature on microstructure and properties of AlCoCrCuFeNi high-entropy alloy［J］. Intermetallics, 2009, 17: 266-269.
【11】李安敏, 张喜燕, 刘乐林,等. 退火对AlCrFeCoNiCu高熵合金组织与性能的影响［J］. 机械工程材料, 2012, 36(7): 14-16.
【12】刘源, 李言祥, 陈祥. 多主元高熵合金研究进展［J］. 材料导报, 2006, 20(4): 4-14.
【13】YEH J W. Recent progress in high-entropy alloys［J］. Annales De Chimie-Science Des Materiaux, 2006, 31(6): 633-648.
【14】ZHANG C H, LIN M H, WU B, et al. Explore the possibility of forming FCC high entropy alloys in equal-atomic systems CoFeMnNiM and CoFeMnNiSmM［J］. Journal of Shanghai Jiaotong University (Science), 2011, 16(2): 173-179.
【15】ZHANG Y, MA S G, QIAO J W. Morphology transition from dendrites to equiaxed grains for AlCoCrFeNi high-entropy alloys by copper mold casting and Bridgman solidification［J］. Metallurgical and Materials Transactions A,2012,43: 2625-2630.
【16】HANNA J A, BAKER I, WITTMANN M W. A new high-strength spinodal alloy［J］. Materials Research Society, 2005, 20(4): 791-795.
【17】QIU X W, LIU C G. Microstructure and properties of Al2CrFeCoCuTiNix high-entropy alloys prepared by laser cladding［J］. Journal of Alloys and Compounds, 2013, 553: 216-220.
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