热处理对WCp/2024Al复合材料耐蚀性能及力学性能的影响
Effect of Heat Treatment on Corrosion Resistance and Mechanical Properties of WCp/2024Al Metal Matrix Composite
摘 要
采用扫描电镜、失重试验、动电位极化曲线、拉伸试验等方法, 研究了两种热处理工艺(T4和T6)对WCp/2024Al复合材料的抗腐蚀性能及力学性能的影响。结果表明, WCp/2024Al复合材料主要在基体中富铜相/贫铜区界面处发生点蚀。T4热处理显著减少基体中富铜相析出而大幅度降低了点蚀敏感性。点蚀对该复合材料的力学性能破坏显著, 盐雾腐蚀试验480 h后T4态复合材料的剩余强度优于T6态复合材料。
热处理工艺
点蚀
力学性能
metal matrix composite(MMC)
heat treatment
pitting
mechanical property
Abstract
The corrosion resistance and mechanical properties of WCp/2024Al metal metrix composite(MMC) under difference heat treatment conditions were studied by SEM, electrochemical technique, mass loss test and tensile test. The results showed that WCp/2024Al MMC suffered pitting occurring in the interface of copper-rich phase/copper-poor area. T4 treatment significantly reduced the precipitation of copper-rich phase and led to significant reduction on the pitting susceptibility. The effect of pitting in the mechanical properties of the composite was significant. the residual strength of the composite material in T4 state was superior to that of the composite material in T6 stare.
中图分类号 TG174.2 TB33
所属栏目 试验研究
基金项目
收稿日期 2012/1/4
修改稿日期
网络出版日期
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联系人作者毛昌辉(mao@grinm.com)
备注毛昌辉, 教授,
引用该论文: WANG Dao-bin,MAO Chang-hui,GAN Bin,YANG Jian. Effect of Heat Treatment on Corrosion Resistance and Mechanical Properties of WCp/2024Al Metal Matrix Composite[J]. Corrosion & Protection, 2013, 34(1): 33
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参考文献
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【6】梁秋实, 毛昌辉, 杨剑, 等.WCp/2024Al复合材料界面反应的分析[J].粉末冶金技术, 2009, 27(5):327-330.
【2】Hihara L H, Latansion R M.Corrosion of metal matrix composites[J].Inter Mater Rev, 1994, 39(6): 245-264(20).
【3】Diaz-Ballote L, Veleva L, Pech-Canul M A, et al. Activity of SiC particles in Al-based metal matrix composites revealed by SECM[J]. J Electrochem Soc, 2004, 151(6): 299-303.
【4】Winkler S L, Ryan M P, Flower H M. Pitting corrosion in cast 7× × × aluminum alloys and fibre reinforced MMCS[J]. Corros Sci, 2004, 46(4): 893-902.
【5】Kiourtsidis G E, Skolianos S M, Pavlidou E G.A study on pitting behaviour of AA2024/SiCp composites using the double cycle polarization technique[J].Corrosion Science, 1999, 41(6):1185-1203.
【6】梁秋实, 毛昌辉, 杨剑, 等.WCp/2024Al复合材料界面反应的分析[J].粉末冶金技术, 2009, 27(5):327-330.
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