| 1 | Age-hardening behavior,corrosion mechanisms,and passive film structure of nanocrystalline Al-V supersaturated solid solution显示文摘The effect of age-hardening on microstructure,hardness,and corrosion of an Al-5at.%V alloy,produced us-ing high-energy ball milling and subsequent cold compaction,has been investigated.The alloy exhibited a grain size below 100 nm and extremely high solid solubility of V in Al(3.1 at.%).The age-hardening was carried out at 150,200,and 250℃.The peak-aged condition of 150℃ demonstrated the highest hardness-transpired from grain refinement,precipitation,and solid solution hardening.The corrosion re-sistance of the Al-5at.%V alloy was studied as a function of aging conditions.The peak-aged condition retained the corrosion resistance while it deteriorated in the over-aged condition.Nonetheless,the cor-rosion resistance of the ball-milled Al alloys in all the aging conditions was superior to that of pure Al.The passive film structure and origin of corrosion were studied using scanning/transmission electron mi-croscopy(S/TEM).The high corrosion resistance of the alloy was attributed to the V enrichment at the film/metal interface and deposition of V on the cathodic phases,which suppresses the dissolution of Al within the pit and therefore promotes repassivation in the early stages of corrosion. | J.Christudasjustus M.R.Felde C.S.Witharamage J.Esquivel A.A.Darwish C.Winkler R.K.Gupta | 2023 | Journal of Materials Science & Technology2023，，4： | 0 |
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