AlxFeCoNiCrTi合金的抗氧化性能及其退火态的组织和硬度
Oxidation Resistance of AlxFeCoNiCrTi Alloys and Its Microstructure and Hardness in Annealing State
摘 要
利用XRD、SEM、DSC和TG等方法研究了AlxFeCoNiCrTi(x=0.5,1,1.5)高熵合金铸态和不同温度退火后的显微组织、相结构、硬度及其抗氧化性能.结果表明:随着退火温度升高,Al0.5FeCoNiCrTi合金和Al1FeCoNiCrTi合金在785 ℃左右退火会析出Fe2Ti型的Laves相,合金中的fcc和bcc2相除了长大外,形态基本没有变化;而Al1.5FeCoNiCrTi合金基本保持铸态组织不变;铸态及退火态合金硬度较高(约60 HRC),具有非常强的抗回火软化能力以及一定的高温应用价值;该系合金具有优越的抗氧化性能,尤其Al0.5FeCoNiCrTi合金的抗氧化性能最佳.
退火
硬度
抗氧化性
AlxFeCuCoNiCrTi high-entropy alloy
annealing
hardness
oxidation resistance
Abstract
The microstructure,phase structure,hardness and oxidation resistance of as-cast and annealed at different temperatures AlxFeCoNiCrTi(x=0.5,1 and 1.5) high-entropy alloys were investigated by using XRD,SEM,DSC and TG.The results show that,with increasing the annealing temperature,Fe2Ti type Laves phase precipitated from Al0.5FeCoNiCrTi and Al1FeCoNiCrTi alloys annealed at 785 ℃.The morphology of fcc and bcc2 phases in the alloys had no transformation,but the grains grew up.The microstructure of Al1.5FeCoNiCrTi alloy was stable,and was as-cast microstructure.The hardness of as-cast and annealed alloys was about 60 HRC and exhibited extreme tempering resistance and possess application value under high temperature condition.The alloys had excellent performance in oxidation resistance,and that of Al0.5FeCoNiCrTi was the best.
中图分类号 TG146
所属栏目 材料性能及其应用
基金项目 广西自然科学基金资助项目(0647092)
收稿日期 2009/1/10
修改稿日期 2009/8/4
网络出版日期
作者单位点击查看
备注李伟(1979-),男,山东临沂人,硕士研究生.
引用该论文: LI Wei,LIU Gui-zhong,LUO Xiao-yan,GUO Jing-jie. Oxidation Resistance of AlxFeCoNiCrTi Alloys and Its Microstructure and Hardness in Annealing State[J]. Materials for mechancial engineering, 2010, 34(2): 43～46
李伟,刘贵仲,罗晓艳,郭景杰. AlxFeCoNiCrTi合金的抗氧化性能及其退火态的组织和硬度[J]. 机械工程材料, 2010, 34(2): 43～46
被引情况:
【1】黄艺娜,唐群华,戴品强, "轧制变形对Al0.3CoCrFeNi高熵合金显微组织和性能的影响",机械工程材料 39, 51-54(2015)
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【8】刘源,李言祥,陈祥,等.多主元高熵合金研究进展[J].材料导报,2006,20(4):4-6.
【9】刘源,陈敏,李言祥.多主元高熵合金的组织和性能特点[J].特种铸造及有色合金,2006(增刊):252-255.
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【12】ZHANG Y,WANG X F,CHEN G L.Effect of Ti on the microstructure and properties of CoCrCuFeNiTix high-entropy alloys[J].Ann Chim Sci Mat,2006,31(6):699-709.
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