强流脉冲电子束处理亚稳β钛合金的组织演化

发布时间：2018-01-22 10:38

本文关键词： 强流脉冲电子束亚稳β钛合金表面处理组织结构　出处：《原子核物理评论》2015年S1期 　论文类型：期刊论文

【摘要】：采用强流脉冲电子束对含有α+β两相的亚稳β钛合金进行了表面处理。处理使用的电子束加速电压为27 k V,脉冲次数分别为5,10和25次,脉冲持续时间为2μs。采用金相显微镜、扫描电子显微镜、电子背散射衍射和X射线衍射等技术对处理后的样品表面形貌和组织结构进行分析。结果表明,5次脉冲处理样品表面呈现波状特征,增加脉冲处理,样品表面变得较为平坦且出现了层片状特征;处理后样品表层α相逐渐消失,出现了应力诱发的α′′马氏体组织。
[Abstract]:The surface of metastable 尾 titanium alloy containing 伪尾 two-phase was treated by high current pulsed electron beam. The accelerating voltage of electron beam was 27 kV and the pulse number was 5 10 and 25 times, respectively. The pulse duration was 2 渭 s. The surface morphology and microstructure of the treated samples were analyzed by metallographic microscope, scanning electron microscope, electron backscattering diffraction and X-ray diffraction. The surface of the samples treated with five pulses showed wave-like characteristics, and the surface of the samples became flat and lamellar when pulse treatment was added. After treatment, the 伪 phase in the surface layer of the sample gradually disappeared, and the stress induced 伪 'martensite structure appeared.
【作者单位】：中国工程物理研究院;
【基金】：中国工程物理研究院科学技术发展基金(2012B0301047)~~
【分类号】：TG174.444
【正文快照】： 1引言强流脉冲电子束(HCPEB)作为一种高能脉冲束表面技术近些年来持续受到关注,该技术集合了简单可靠、高效低耗等多种优点,显示出了巨大的应用潜力。HCPEB处理能将携带的能量在极短的时间内沉积于材料表层,诱发处理层产生快速熔化甚至汽化、喷发、应力冲击等现象,随后的快速

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