|
|||||
|
|
| X80管线钢微孔洞形核 | |
| 引用本文： | 邱保文,袁泽喜,周桂峰.X80管线钢微孔洞形核[J].北京科技大学学报,2012,34(5):541-545. |
| 作者姓名： | 邱保文 袁泽喜 周桂峰 |
| 作者单位： | 1. 武汉科技大学材料与冶金学院,武汉430081／武钢研究院,武汉430080 2. 武汉科技大学材料与冶金学院,武汉,430081 3. 武钢研究院,武汉,430080 |
| 基金项目： | 武汉钢铁(集团)公司科研基金资助项目 |
| 摘 要： | 利用扫描电镜和透射电镜等手段,观察了X80管线钢中的夹杂物和MA岛,获得了它们的尺寸统计特征.应用不同颈缩程度的拉伸试验,探明了X80管线钢中微孔洞萌生的机理：第一阶段微孔洞的形核是围绕钙处理夹杂物,在颈缩初期已经开始;第二阶段属高应变量阶段,此时孔洞是通过MA岛/基体界面脱离形核.通过有限元法分析了拉伸过程,确定了试样的真实应力--应变曲线,计算了钙处理夹杂物/基体界面强度和MA岛/基体界面强度. |
| 关 键 词： | 管线钢 微孔洞 形核 界面强度 |
Microvoid nucleation in X80 pipeline steel |
|
| QIU Bao-wen,YUAN Ze-xi,ZHOU Gui-feng.Microvoid nucleation in X80 pipeline steel[J].Journal of University of Science and Technology Beijing,2012,34(5):541-545. | |
| Authors: | QIU Bao-wen YUAN Ze-xi ZHOU Gui-feng |
| Institution: | 1) College of Materials and Metallurgy,Wuhan University of Science and Technology,Wuhan 430081,China 2) Research & Development Center,Wuhan Iron and Steel Corporation,Wuhan 430080,China |
| Abstract: | Inclusions and MA islands in X80 pipeline steel were observed and their statistical size characters were obtained by scanning electron microscopy and transmission electron microscopy.The mechanism of microvoid nucleation in X80 pipeline steel was studied through a series of tensile tests with different necking degrees.Microvoid nucleation firstly occurs around calcium treatment inclusions at the early necking stage,while at the deep necking stage,microvoids nucleate by decohesion of MA island/matrix interfaces.Finally the tensile process was analyzed,the curves of true stress to true strain of X80 samples were determined,and the strengths of calcium treatment inclusion/matrix interfaces and MA island/matrix interfaces were calculated by the finite element method. |
| Keywords: | pipeline steel microvoids nucleation interface strength |
| 本文献已被 CNKI 万方数据 等数据库收录！ | |