Tailoring Grain Boundary and Resultant Plasticity of Pure Iron by Pulsed-Electric-Current Treatment
Tailoring Grain Boundary and Resultant Plasticity of Pure Iron by Pulsed-Electric-Current Treatment
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DOI：
10.1007/s11661-018-5012-6
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发表时间：
2018-11
期刊：
影响因子：
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通讯作者：
C. Yang;Yi Zhao;Zhiming Wang;S. Qu;Xinxin Li;W. W. Zhang-W.;Lai‐Chang Zhang
中科院分区：
文献类型：
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作者：
C. Yang;Yi Zhao;Zhiming Wang;S. Qu;Xinxin Li;W. W. Zhang-W.;Lai‐Chang Zhang
一般来说，面心立方金属中会通过热机械过程诱发退火孪晶（Σ3 边界）。我们报告了经脉冲电流处理的纯铁经过 α→γ→α 同素异形转变后的 Σ3 边界诱导塑性增强。该行为归因于随着脉冲电流强度的增加，晶界互连从{112}/{112}演变到{110}/{110}，Σ3晶界数量增加。研究结果提供了一种通过定制特殊晶界来制造高性能金属材料的替代途径。
In general, annealing twins (Σ3 boundaries) are induced in face-centered cubic metals by thermal–mechanical processes. We report on the Σ3 boundary-induced plasticity enhancement of pure iron treated by a pulsed electric current subject to its allotropic transformation ofα→γ→α. The behavior is attributed to an increased amount of Σ3 boundaries with the grain-boundary interconnection evolution from {112}/{112} to {110}/{110} resulting from the increasing pulsed-electric-current intensity. The results provide an alternative pathway to fabricate high-performance metallic materials by tailoring special grain boundaries.