| SiCw／LD2A1复合材料超塑变形协调机制的研究 |
| |
| 引用本文： | 耿林,王桂松,等.SiCw／LD2A1复合材料超塑变形协调机制的研究[J].材料科学与工艺,2001,9(3):225-228. |
| |
| 作者姓名： | 耿林 王桂松 |
| |
| 作者单位： | [1]哈尔滨工业大学材料科学与工程学院，黑龙江哈尔滨150001 [2]哈尔滨工业大学材料科学与工程学院，黑龙江哈尔滨15 |
| |
| 基金项目： | 国家重点基础研究发展计划(973计划)，国家自然科学基金，G2000067206，50071018，， |
| |
| 摘 要： | 为了研究金属基复合材料超塑变形时液相的作用，分析了金属基复合材料界面处的局部应力，当由滑移引起的界面处局部分应力值高于界施加于同处应力值时，复合材料在含有液相的状态下超塑变形能力量大，反之，变形能力在不含液相的纯固相状态最大，因此，可以认为塑性变形过程中当有应力集中产生时，为了缓解应力集中，液相必需存在才能取得超塑性，当无应力集中时，超塑变形不需要液相的存在，上述理论与实验结果是一致的。
|
| 关 键 词： | 超塑性 金属基复合材料 辅助协调机制 液相 超塑变形 SiCw／LD2A1 碳化硅 铝 |
| 文章编号： | 1005-0299(2001)03-0225-04 |
| 修稿时间： | 2001年3月2日 |
Investigation of coordination mechanism in superplastic deformation of SiCw/LD2AL composite |
| |
| GENG Lin,WANG Gui song,MENG Qing chang,WANG De zun,YAO Zhong kai,LEI Ting quan.Investigation of coordination mechanism in superplastic deformation of SiCw/LD2AL composite[J].Materials Science and Technology,2001,9(3):225-228. |
| |
| Authors: | GENG Lin WANG Gui song MENG Qing chang WANG De zun YAO Zhong kai LEI Ting quan |
| |
| Abstract: | Local stress at the interfaces is analyzed to make clear the role of the liquid phase in superplasticity for metal matrix composites. When the local stress caused by sliding along the interface is higher than that applied on to the interface, the maximum superplastic deformability is obtained in the material containing a liquid phase. On the contrary, the deformability is maximum in a fally solid state. Therefore, it is suggested that when the stress concentration is caused, a liquid phase is needed in order to relax the stress concentrations. However, when no stress concentrations are caused, a liquid phase is not needed for superplasticity. This theory is in good agreement with the experiment results. |
| |
| Keywords: | superplasticity metal matrix composites caordination mechanism liquid phase |
| 本文献已被 CNKI 维普 等数据库收录！ |
