Microstructural, textural and hardness evolution of commercially pure Zr surface-treated by high current pulsed electron beam

Microstructural, textural and hardness evolution of commercially pure Zr surface-treated by high current pulsed electron beam
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高电流脉冲电子束表面处理的商业纯锆的微观结构、织构和硬度演变

DOI:
10.1016/j.apsusc.2016.08.128
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发表时间:
2016-12
影响因子:
6.7
通讯作者:
K. L. Murty
K. L. Murty
中科院分区:
材料科学1区
文献类型:
--
作者:
L. Chai;B. Chen;S. Wang;Z. Zhang;K. L. Murty

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采用强流脉冲电子束(HCPEB)对工业纯锆板进行表面处理,结果表明其表面改性效果显著。在HCPEB处理之后,具有双峰基底织构的先前等轴晶粒被具有致密纳米孪晶和垂直于板表面的< 11 2 <$0>的不寻常纤维织构的超细板取代。脉冲次数的增加导致进一步细化的显微组织和强化的织构,共同导致硬度的持续增加。这种修改的原因主要是由于存在复杂的热和应力场而导致的超快速加热/冷却和强变体选择。
High current pulsed electron beam (HCPEB) treatments were performed for a commercially pure Zr sheet, with remarkable surface modifications demonstrated. After the HCPEB treatments, the prior equiaxed grains with a bimodal basal texture are replaced by ultra fine plates with dense nanotwins and an unusual fiber texture of< 11 2¯ 0> normal to the sheet surface. Increased number of pulses leads to further refined microstructures and intensified textures, jointly resulting in continuous increase of hardness. Reasons for such modifications could mainly be attributed to ultra fast heating/cooling and strong variant selection due to presence of complex thermal and stress fields.
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