| Grain size effects on the austenitization process in a nanostructured ferritic steel | |
| L. M. Wang; Z. B. Wang; K. Lu | |
| 2011 | |
| 发表期刊 | Acta Materialia
 |
| ISSN | 1359-6454 |
| 卷号 | 59期号:9页码:3710-3719 |
| 摘要 | A surface layer with a depth-dependent microstructure was produced on a ferritic steel (P92) plate by means of surface mechanical attrition treatment (SMAT). The austenitization processes of ferrite and carbides in the surface layers with different average grain sizes were investigated by means of in situ X-ray diffraction, differential scanning calorimetry and transmission electron microscopy. Experimental results showed that the onset temperature of the austenitization process decreases gradually with decreasing sizes of ferrite grains and carbide particles, being similar to 120 K lower in the top SMAT surface layer compared with that in the original sample. In addition, the two-step austenitization process in the surface layers becomes a one-step one when the mean size of carbide particles is smaller than 20 nm. The effects of microstructure refinement on the accelerated austenitization processes were discussed in terms of thermodynamic and kinetic. (C) 2011 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved. |
| 部门归属 | [wang, l. m.; wang, z. b.; lu, k.] chinese acad sci, inst met res, shenyang natl lab mat sci, shenyang 110016, peoples r china.;wang, zb (reprint author), chinese acad sci, inst met res, shenyang natl lab mat sci, 72 wenhua rd, shenyang 110016, peoples r china;zbwang@imr.ac.cn lu@imr.ac.cn |
| 关键词 | Nanostructured Surface Mechanical Attrition Treatment Ferritic Steel Grain Size Effects Austenitization Process Mechanical Attrition Treatment Severe Plastic-deformation Phase-transformation Martensitic Steel Carbon-steel Nanocrystalline Materials Nanometer-scale Surface-layer Tool Steel Refinement |
| URL | 查看原文 |
| WOS记录号 | WOS:000290692600037 |
| 引用统计 | |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://ir.imr.ac.cn/handle/321006/30731 |
| 专题 | 中国科学院金属研究所 |
| 推荐引用方式 GB/T 7714 | L. M. Wang,Z. B. Wang,K. Lu. Grain size effects on the austenitization process in a nanostructured ferritic steel[J]. Acta Materialia,2011,59(9):3710-3719. |
| APA | L. M. Wang,Z. B. Wang,&K. Lu.(2011).Grain size effects on the austenitization process in a nanostructured ferritic steel.Acta Materialia,59(9),3710-3719. |
| MLA | L. M. Wang,et al."Grain size effects on the austenitization process in a nanostructured ferritic steel".Acta Materialia 59.9(2011):3710-3719. |
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