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Updated: Jun 6, 2025

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Determining the Mechanical Strength of Ultra-Fine-Grained Metals
Published on: November 22, 2021
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微力学建模Mg合金中的机械性质与双模粒粒度分布的微力学建模
Shaojie Li1,2, Jianfeng Jin1,2, Hao Sun1
1School of Materials Science and Engineering, Northeastern University, Shenyang 110819, China.
Nanomaterials (Basel, Switzerland)
|November 26, 2024
概括
在ZK60合金中的双模粒结构 (BGS) 增强了强度和可塑性. 优化粗粒大小,体积分数 (~30%),以及纹理是通过异形变形诱导 (HDI) 效应获得优质机械性能的关键.
科学领域:
- 材料科学 材料科学 材料科学
- 机械工程 机械工程
- 金工业是金工业的一个方面.
背景情况:
- (Mg) 合金中的双模粒结构 (BGS) 提供了高强度和良好的可塑性的理想平衡.
- 异形变形诱导 (HDI) 效应在这些合金的机械行为中起着至关重要的作用.
研究的目的:
- 研究粗粒 (CG) 尺寸,体积分数和纹理强度对ZK60 Mg合金的机械性能和HDI效应的影响.
- 确定最佳的微结构参数,以提高强度和可塑性.
主要方法:
- 使用了莫里-塔纳卡平均场方法.
- 应用应变梯度理论的可塑性.
- 分析了CG特征 (尺寸,比例,体积分数,纹理) 对机械响应的影响.
主要成果:
- 机械性能随着CG尺寸的增加而降低,这是由于HDI效应补偿不足.
- 沿着加载方向的较高CG比例会削弱HDI效应,从而降低整体性能.
- 通过大约30%的CG体积分数,可以实现最佳的全面机械性能.
- 增加CG基底纹理强度会提高收益率,但会降低最终的抗拉强度.
结论:
- 通过调节HDI效应,CG尺寸和尺寸比显著影响机械性能.
- 大约30%的CG体积分数提供了强度和可塑性的最佳组合.
- CG纹理方向极大地影响产量和抗拉强度,特定的硬度方向最大限度地延伸均.
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