| 动态条件下Fe-24Mn-0.5C孪晶诱发塑性钢的断裂机制 |
| |
| 引用本文： | 周小芬,符仁钰,苏钰,李麟.动态条件下Fe-24Mn-0.5C孪晶诱发塑性钢的断裂机制[J].机械工程材料,2009(11). |
| |
| 作者姓名： | 周小芬 符仁钰 苏钰 李麟 |
| |
| 作者单位： | 上海大学材料科学与工程学院;上海工程技术大学材料工程学院; |
| |
| 基金项目： | 先进钢铁材料技术国家工程研究中心项目(50671061) |
| |
| 摘 要： | 对Fe-24Mn-0.5C孪晶诱发塑性钢进行了动态冲击拉伸试验,并采用扫描电镜、透射电镜等研究了该钢的断裂机制。结果表明:试验钢的抗拉强度为1 100 MPa,断后伸长率为50%;试验钢表现为典型的韧性断裂特征,断口主要由呈阶梯状的韧窝组成;其断裂机制为变形过程中塞积在晶界和孪晶界处的大量位错促使孔洞及裂纹的产生,继续变形则发生断裂。
|
| 关 键 词： | 孪晶诱发塑性钢 动态拉伸 微孔洞 断裂机制 |
Fracture Mechanism of Fe-24Mn-0.5C TWIP Steel under Dynamic Conditon |
| |
| ZHOU Xiao-fen,FU Ren-yu,SU Yu,LI Lin.Fracture Mechanism of Fe-24Mn-0.5C TWIP Steel under Dynamic Conditon[J].Materials For Mechanical Engineering,2009(11). |
| |
| Authors: | ZHOU Xiao-fen FU Ren-yu SU Yu LI Lin |
| |
| Affiliation: | ZHOU Xiao-fen1,FU Ren-yu1,SU Yu1,2,LI Lin1(1.School of Materials Science and Engineering,Shanghai University,Shanghai 200072,China,2.School of Materials Engineering,Shanghai University of Engineering Science,Shanghai 201620,China) |
| |
| Abstract: | The fracture mechanism of Fe-24Mn-0.5C TWIP steel after dynamic impact tension was studied by using SEM and TEM.The results show that the tensile strength of the test steel was 1 100 MPa and rupture elongation was 50%.It showed typical ductile fracture characteristics.The fracture contained lots of stepladder dimples.The fracture mechanism was the formation of holes and cracks promoted by the dislocation piled up in grain and twin boundaries during the deformation process,and fracture would appear with furt... |
| |
| Keywords: | TWIP steel dynamic tension micro-void fracture mechanism |
| 本文献已被 CNKI 等数据库收录！ |
|
