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微量硼的添加對Ti-9V-3Al-4Sn-5Mo合金顯微組織和力學性能的影響
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更新時間：2015-08-29
為掌握B元素的添加對Ti-9V-3Al-4Sn-5Mo合金顯微組織和力學性能的影響規(guī)律，采用電子探針微區(qū)分析儀(EPMA)、光學顯微鏡(OM)、掃描電鏡(SEM)、萬能試驗機(UTM)等設備，詳細研究(Ti-9V-3Al-4Sn-5Mo)1-xBx(x=0，0.04，0.08)合金的成分、顯微組織與力學性能等。
微量硼的添加對Ti-9V-3Al-4Sn-5Mo合金顯微組織和力學性能的影響Effect of minor boron additions on microstructures and
mechanical properties of Ti-9V-3Al-4Sn-5Mo alloy
為掌握B元素的添加對Ti-9V-3Al-4Sn-5Mo合金顯微組織和力學性能的影響規(guī)律，采用電子探針微區(qū)分析儀(EPMA)、光學顯微鏡(OM)、掃描電鏡(SEM)、萬能試驗機(UTM)等設備，詳細研究(Ti-9V-3Al-4Sn-5Mo)1-xBx(x=0，0.04，0.08)合金的成分、顯微組織與力學性能等。研究結果表明：B的添加可以明顯細化Ti-9V-3Al-4Sn-5Mo合金的晶粒，且B元素在合金中以TiB相的形式存在。隨著B質量分數(shù)(0，0.04%，0.08%)的增加，TiB相的質量分數(shù)亦逐漸增加，軋制態(tài)和固溶態(tài)合金的強度亦逐漸增加，時效態(tài)合金的強度先增加后減少。軋制態(tài)、固溶態(tài)以及時效態(tài)合金的塑性均先增加后減少。
In order to understand the effect of minor boron
additions on microstructures and mechanical properties of Ti-9V-3Al-4Sn-5Mo
alloy, the chemical compositions, microstructures and mechanical properties of
(Ti-9V-3Al-4Sn-5Mo)1-xBx (x=0, 0.04, 0.08) alloys were
systematically studied by electron probe micro-analyzer (EPMA), optical
microscope (OM), scanning electron microscope (SEM) and universal testing
machine (UTM). The obtained results are described as follows: B additions can
obviously refine the crystal grains of Ti-9V-3Al-4Sn-5Mo alloy, and exist in the
form of TiB phases. With increasing B additions (0, 0.04%, 0.08%), the contents
of TiB phase and the tensile strength of the rolled and solution-treated alloys
increase, while the tensile strength of the aged alloys first increases and then
decreases. The ductility of the rolled, solution-treated and aged alloys first
increases and then decreases.
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