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OALib Journal期刊
ISSN: 2333-9721
费用：99美元
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微量sr和mn对mg-8li-3al变形合金力学性能的影响*
Keywords: 金属材料,镁锂合金,sr和mn,微观组织,力学性能
Abstract:
？用光学显微镜(om)、扫描电子显微镜(sem)、x射线衍射仪(xrd)和电子万能试验机对比研究了微量添加sr和mn对mg-8li-3al合金组织和力学性能的影响,结果表明:基础合金mg-8li-3al主要由α-mg,β-li和al12mg17金属间化合物组成,sr和mn的加入使合金中形成了al4sr和al2mn3等金属间化合物。合金元素sr和mn对合金组织均有细化效果,sr的细化效果优于mn。添加sr和mn后合金的强度均有所提高,其中挤压态mg-8li-3al-0.5sr-0.5mn合金的σb=242.15mpa,σ0.2=206.96mpa,δ=22.43%,比mg-8li-3al镁合金的力学性能分别提高了14.98%,28.11%和8.31%。
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