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| 冲击接触载荷下45钢的微观塑性变形特征与损伤 | |
| 引用本文： | 许云华,熊建龙,武红,陈渝眉,朱金华.冲击接触载荷下45钢的微观塑性变形特征与损伤[J].金属学报,2000,36(8):809-812. |
| 作者姓名： | 许云华 熊建龙 武红 陈渝眉 朱金华 |
| 作者单位： | 1. 西安交通大学材料强度国家重点实验室,西安,710049;西安建筑科技大学耐磨材料研究所,西安,710055 2. 西安建筑科技大学耐磨材料研究所,西安,710055 3. 西安交通大学材料强度国家重点实验室,西安,710049 |
| 基金项目： | 国家自然科学基金资助项目59771048 |
| 摘 要： | 选取退火４５钢为研究对象，考察冲击接触载荷下亚表层微观形变特征与损伤，结果表明，冲击接触载荷下，铁素体的变形以多滑移为特征；滑移在晶界受阻产生应力集中并产生力偶使晶粒发生相对转动，从而在晶界产生裂纹；亚晶界和亚晶粒的形成是不同区域的不同滑移系统的交互作用的结果。 |
| 关 键 词： | 冲击接触载荷 微观形变特征 损伤 45钢 |
| 文章编号： | 0412-1961(2000)08-0809-04 |
| 修稿时间： | 1999年11月3日 |
CHARACTERISTICS OF MICRO-DEFORMATION AND DAMAGE OF MILD CARBON STEEL UNDER IMPACT CONTACT LOAD |
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| XU Yunhua,XIONG Jianlong,WU Hong,CHEN Yumei,ZHU Jinhua.CHARACTERISTICS OF MICRO-DEFORMATION AND DAMAGE OF MILD CARBON STEEL UNDER IMPACT CONTACT LOAD[J].Acta Metallurgica Sinica,2000,36(8):809-812. | |
| Authors: | XU Yunhua XIONG Jianlong WU Hong CHEN Yumei ZHU Jinhua |
| Abstract: | An examination of characteristics of micro-deformation and damage of mild carbon steel was conducted under impact contact load by SEM. The following results were obtained: (1) The characteristics of ferrite deformation under impact contact load is multi-slip; (2) Grain rotation which produces crack on the grain boundary was caused by force couple because slip is obstructed and stress concentrated on the grain boundary; (3) Sub-grain boundaries and sub-grains are the result of intersecting of different slip systems in different area within a ferrite grain. |
| Keywords: | impact load micro-characteristics of deformation damage |
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