| 原奥氏体晶粒尺寸对珠光体钢组织及韧性的影响 |
| |
| 引用本文： | 梁宇,向嵩,梁益龙,杨明,魏泽民,熊虎,李静.原奥氏体晶粒尺寸对珠光体钢组织及韧性的影响[J].材料导报,2017,31(2):77-81. |
| |
| 作者姓名： | 梁宇 向嵩 梁益龙 杨明 魏泽民 熊虎 李静 |
| |
| 作者单位： | 贵州大学材料与冶金学院, 贵阳550025;贵州省材料结构与强度重点实验室, 贵阳 550025,贵州大学材料与冶金学院, 贵阳550025;贵州省材料结构与强度重点实验室, 贵阳 550025,贵州大学材料与冶金学院, 贵阳550025;贵州省材料结构与强度重点实验室, 贵阳 550025,贵州大学材料与冶金学院, 贵阳550025;贵州省材料结构与强度重点实验室, 贵阳 550025,贵州大学材料与冶金学院, 贵阳550025;贵州省材料结构与强度重点实验室, 贵阳 550025,贵州大学材料与冶金学院, 贵阳550025;贵州省材料结构与强度重点实验室, 贵阳 550025,贵州大学材料与冶金学院, 贵阳550025;贵州省材料结构与强度重点实验室, 贵阳 550025 |
| |
| 摘 要： | 探索了奥氏体晶粒尺寸对珠光体等温转变组织特征以及对韧性性能的影响规律。研究表明,在相同等温转变温度下,珠光体片层间距无明显变化,随奥氏体晶粒尺寸的增加,先共析铁素体量减少而珠光体团尺寸增加。珠光体断裂韧性受控于裂纹前沿塑性影响区尺寸(1~2)δc,其中δc为临界裂纹张开位移,当原奥氏体晶粒大于(1~2)δc时,裂纹扩展阻力主要来自穿越珠光体片层α、θ相的颈缩、破断。当原奥氏体晶粒尺寸接近或小于(1~2)δc时,裂纹主要沿晶界、珠光体团界、α+θ片层界面扩展,通过扩展路径发生多次弯折消耗能量,随原奥氏体晶粒尺寸增加,准静态断裂韧度J变化幅度较小。而冲击韧性缺口前沿塑性影响区远大于原奥氏体晶粒,大角度晶界将促使裂纹的转折而提高扩展阻力,提高裂纹前沿塑性区大角度晶界密度有利于提高冲击功,冲击韧性Ak随晶粒尺寸的增加显著下降。
|
| 关 键 词： | 珠光体 奥氏体晶粒尺寸 韧性 裂纹路径 |
Effect of Prior Austenite Grain Size on Microstructure and Toughness of Pearlitic Steel |
| |
| LIANG Yu,XIANG Song,LIANG Yilong,YANG Ming,WEI Zemin,XIONG Hu and LI Jing.Effect of Prior Austenite Grain Size on Microstructure and Toughness of Pearlitic Steel[J].Materials Review,2017,31(2):77-81. |
| |
| Authors: | LIANG Yu XIANG Song LIANG Yilong YANG Ming WEI Zemin XIONG Hu and LI Jing |
| |
| Affiliation: | School of Materials and Metallurgy, Guizhou University, Guiyang 550025;The Key Laboratory for Mechanical Behavior and Microstructure of Materials, Guiyang 550025,School of Materials and Metallurgy, Guizhou University, Guiyang 550025;The Key Laboratory for Mechanical Behavior and Microstructure of Materials, Guiyang 550025,School of Materials and Metallurgy, Guizhou University, Guiyang 550025;The Key Laboratory for Mechanical Behavior and Microstructure of Materials, Guiyang 550025,School of Materials and Metallurgy, Guizhou University, Guiyang 550025;The Key Laboratory for Mechanical Behavior and Microstructure of Materials, Guiyang 550025,School of Materials and Metallurgy, Guizhou University, Guiyang 550025;The Key Laboratory for Mechanical Behavior and Microstructure of Materials, Guiyang 550025,School of Materials and Metallurgy, Guizhou University, Guiyang 550025;The Key Laboratory for Mechanical Behavior and Microstructure of Materials, Guiyang 550025 and School of Materials and Metallurgy, Guizhou University, Guiyang 550025;The Key Laboratory for Mechanical Behavior and Microstructure of Materials, Guiyang 550025 |
| |
| Abstract: | |
| |
| Keywords: | pearlite austenite grain size toughness crack propagation path |
| 本文献已被 CNKI 等数据库收录！ |
| 点击此处可从《材料导报》浏览原始摘要信息 |
|
点击此处可从《材料导报》下载全文 |
|
