| 双相NiAl金属间化合物超塑性 |
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| 引用本文： | 胡 静,林栋樑.双相NiAl金属间化合物超塑性[J].稀有金属材料与工程,2011,40(5):817-819. |
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| 作者姓名： | 胡 静 林栋樑 |
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| 作者单位： | 1. 常州大学,江苏,常州,213164
2. 上海交通大学,上海,200030 |
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| 基金项目： | 国家自然科学基金(59895150)；江苏省人事厅“六大人才高峰”项目(07-A-009) |
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| 摘 要： | 研究双相Ni-31Al金属间化合物的高温变形行为。结果表明,该合金在950~1075℃温度范围,1.25×10-4~8×10-3s-1应变速率范围内呈超塑性变形。在温度为1000℃、应变速率为5×10-4s-1时,最大延伸率可达281.3%。显微结构分析表明,超塑性变形过程中两相具有很好的协调变形能力,超塑性变形后原始组织拉长、细化。双相Ni-31Al金属间化合物超塑性变形机制可能为连续动态回复与再结晶。
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| 关 键 词： | 二元NiAl 金属间化合物 超塑性 连续动态回复与再结晶 |
| 收稿时间： | 2010/5/21 0:00:00 |
Superplasticity in Dual-Phase NiAl Intermetallics |
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| Hu Jing and Lin Dongliang.Superplasticity in Dual-Phase NiAl Intermetallics[J].Rare Metal Materials and Engineering,2011,40(5):817-819. |
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| Authors: | Hu Jing and Lin Dongliang |
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| Affiliation: | Changzhou University, Changzhou 213164, China |
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| Abstract: | Deformation behavior of dual-phase Ni-31Al intermetallics at high temperature was investigated. Results show that the alloy exhibits superplastic deformation behavior at the initial strain rate of 1.25×10-4- 8×10-3 s-1 and in the temperature range of 950-1075 oC. A maximum elongation of 281.3% is obtained at 5×10-4 s-1 and 1000 oC. Microstructure analyses show that the dual phases have excellent compatible deformability during the superplastic deformation process. The initial coarse microstructure becomes much longer and finer after superplastic deformation. The superplastic phenomenon in dual-phase Ni-31Al can be explained by continuous dynamic recovery and recrystallization |
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| Keywords: | binary NiAl intermetallics superplasticity continuous dynamic recovery and recrystallization |
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