碳含量对FeCoCrNiMnCx高熵合金显微组织与性能的影响
Effects of Carbon Content on Microstructure and Properties of FeCoCrNiMnCx High-Entropy Alloys
摘 要
采用悬浮冷坩埚熔炼法制备了不同碳含量的FeCoCrNiMnCx(x为0, 0.1, 0.2, 0.3, 0.4)高熵合金, 研究了碳含量对其显微组织、力学性能和耐蚀性能的影响。结果表明: FeCoCrNiMnCx高熵合金具有典型的树枝晶组织; 随着碳含量增加, Cr7C3析出相增多, 尺寸增大,合金的硬度增大, 强度呈先增后减的变化规律, 当x=0.3时,合金的抗拉强度最高, 为665 MPa; 在质量分数为3.5%的NaCl溶液中, 合金的自腐蚀电流密度随着碳含量增加而减小, FeCoCrNiMnC0.4合金具有最佳的耐蚀性能。
显微组织
力学性能
耐蚀性能
high-entropy alloy
microstructure
mechanical property
corrosion resistance
Abstract
High entropy alloys FeCoCrNiMnCx(x is 0, 0.1, 0.2, 0.3, 0.4) with different carbon contents were prepared by cold crucible smelting method, and effects of carbon content on microstructure, mechanical properties and corrosion resistance of the alloys were studied. The results show that high entropy alloys FeCoCrNiMnCx had the typical dendrite structure. With the increase of carbon content, the number and size of precipitate Cr7C3 increased, the hardness increased and the strength increased and then decreased. The maximum tensile strength of the alloy was up to 665 MPa when x=0.3. In 3.5wt% NaCl solution, with the increase of carbon content, the corrosion current density of the alloys decreased, and the alloy FeCoCrNiMnC0.4 owned the best corrosion resistance.
中图分类号 TG146 DOI 10.11973/jxgccl201608018
所属栏目
基金项目 福建省高校产学合作科技重大专项项目(2012H6001)
收稿日期 2015/4/10
修改稿日期 2016/3/15
网络出版日期
作者单位点击查看
备注饶湖常(1990-), 男, 福建南平人, 硕士研究生。
引用该论文: RAO Hu-chang,DAI Pin-qiang,CHEN Ding-ning,WANG Qian-ting. Effects of Carbon Content on Microstructure and Properties of FeCoCrNiMnCx High-Entropy Alloys[J]. Materials for mechancial engineering, 2016, 40(8): 76～80
饶湖常,戴品强,陈鼎宁,王乾廷. 碳含量对FeCoCrNiMnCx高熵合金显微组织与性能的影响[J]. 机械工程材料, 2016, 40(8): 76～80
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【12】LIN C, LAI H, KUO J, et al. Effect of carbon content on solidification behaviors and morphological characteristics of the constituent phases in Cr-Fe-C alloys［J］. Materials Characterization, 2011, 62(12): 1124-1133.
【13】AKIRA T, AKIHISA I. Classification of bulk metallic glasses by atomic size difference, heat of mixing and period of constituent elements and its application to characterization of the main alloying element［J］. Materials Transactions, 2005,46(12): 2817-2829.
【14】TODA-CARABALLO I, RIVERA-DAZ-DEL-CASTILLO P E J. Modelling solid solution hardening in high entropy alloys［J］. Acta Materialia, 2015, 85: 14-23.
【15】HE J Y, LIU W H, WANG H, et al. Effects of Al addition on structural evolution and tensile properties of the FeCoNiCrMn high-entropy alloy system［J］. Acta Materialia, 2014, 62: 105-113.
【16】史一功, 张铁邦, 寇宏超, 等. AlCoCrFeNiCu高熵合金的电化学腐蚀性能研究［J］. 热加工工艺, 2011,40(18): 1-3.
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