强流脉冲电子束作用下20钢的微观结构状态

李艳; 蔡杰; 邹阳; 万明珍; 关庆丰

doi:10.11858/gywlxb.2011.03.012

强流脉冲电子束作用下20钢的微观结构状态

doi: 10.11858/gywlxb.2011.03.012

李艳¹,
蔡杰¹,
邹阳¹,
万明珍¹,
关庆丰^1,2,

1.
江苏大学材料科学与工程学院，江苏镇江 212013；
2.
吉林大学超硬材料国家重点实验室，吉林长春 130012

详细信息

通讯作者:
关庆丰

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出版历程
- 收稿日期: 2010-04-07
- 修回日期: 2010-08-31
- 发布日期: 2011-06-15

The Microstructures in 0.20%C Carbon Steel Induced by High-Current Pulsed Electron Beam

1.
School of Material Science and Engineering, Jiangsu University, Zhenjiang 212013, China;
2.
State Key Laboratory of Superhard Materials, Jilin University, Changchun 130012, China

More Information

Corresponding author: GUAN Qing-Feng

摘要

摘要: 为了研究金属材料的超快变形行为，利用强流脉冲电子束（HCPEB）装置对20钢进行轰击，采用X射线衍射、光学显微镜及透射电镜等技术分析了受轰击样品的变形组织与结构。实验结果表明，强流脉冲电子束能够在材料表层诱发幅值为1 GPa量级的应力，快速的加热和冷却过程在近表层诱发了强烈的塑性变形，并在材料表层内形成了复杂的位错缠结结构和位错胞结构，同时还伴随位错圈等空位簇缺陷的形成，多次轰击导致局部区域形成纳米和非晶结构。HCPBE轰击诱发的幅值极大的应力和极高的应变速率而导致的整个原子平面的位移可能是非晶结构形成的关键原因。
- 强流脉冲电子束 /
- 20钢 /
- 微观结构 /
- 非晶 /
- 位错圈
Abstract: In order to investigate superfast deformation behavior of metal, annealed 0.20%C carbon steel was irradiated with high-current pulsed electron beam (HCPEB). The microstructures of irradiated samples were investigated by using X-ray diffraction (XRD), optical microscopy and transmission electron microscopy (TEM). The experimental results showed that stress of about 1 GPa order was introduced in the irradiated surface layer, which led to severe plastic deformation on the irradiated surface. Both of the complicated configurations of tangle dislocations and dislocation cells were formed within the sublayer. Simultaneously, dislocation loops companied with the dislocations configurations were also produced. In the situation of multi-pulses, characterization by TEM also revealed that the sublayer consisting of some region with the glassy and nanocrystalline structure. It is suggested that the high-level stress and strain rate induced by HCPEB irradiation could cause the shifting of whole atomic planes synchronously. This is the more possible mechanism of the formation of the glassy and nanocrystalline structure.
- high-current pulsed electron beam /
- 0.20%C carbon steel /
- microstructure /
- amorphous structure /
- dislocation loop

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