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| 不同热处理工艺对Fe-30Mn-3Si-4Al TWIP钢力学组织性能的影响 |
| Effect of Different Heat Treatment Processes on Mechanical Properties and Microstructure of Fe-30Mn-3Si-4Al TWIP Steel |
| Received:December 01, 2009 Revised:January 10, 2010 |
| DOI： |
| 中文关键词: TWIP钢 热处理 退火孪晶 形变孪晶 力学性能 |
| 英文关键词: TWIP（Twinning Induced Plasticity）steel heat treatment annealing twins deformation twins mechanical properties |
| 基金项目:广西大学有色金属及材料加工新技术教育部重点实验室资项目（GXKFJ-10） |
| Author Name | Affiliation | | BAO Wei-ping | chool of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083，China | | XIONG Zhi-ping | chool of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083，China | | ZHAO Yan-jun | 1.School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083，China
2.College of Materials Science and Engineering, Guangxi University, Nanning 530004,China | | REN Xue-ping | chool of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083，China |
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| 中文摘要: |
| 采用拉伸性能测试、金相观察、SEM和EDS等方法研究了不同热处理工艺对Fe-30Mn-3Si-4Al TWIP钢微观组织、拉伸力学性能及断口形貌的影响，并采用X 射线衍射仪测定材料的物相组成。结果表明，冷却速度越快，TWIP钢的延伸率和强度越高；热处理后其室温组织为含有退火孪晶的单一奥氏体，冷却速度越小，奥氏体晶粒和退火孪晶的尺寸越大。拉伸时发生典型的延性断裂，在拉伸过程中退火孪晶转变成形变孪晶，使材料的塑性提高。 |
| 英文摘要: |
| Effects of different heat treatment processes on microstructure, tensile mechanical properties and fractography of Fe-30Mn-3Si-4Al TWIP steel were studied by tensile testing, optical microstructure, SEM and EDS, and the phase composition was measured by X-ray diffraction (XRD). The results indicated that elongation and strength of TWIP steel increase with increasing cooling rate; its microstructure with heat treatment is austenite with annealing twins; and the austenite grain and annealing twins size increase with cooling rate decreasing. The fracture mechanism of TWIP steel is typical toughness fracture under the condition of tensile failure. During tension the annealing twins change into deformation twins, which makes the plasticity of materials increase. |
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