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OALib Journal期刊
ISSN: 2333-9721
费用：99美元
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纳米ni和ni/sicp纳米复合材料的超塑性
Keywords: 材料科学基础学科,超塑性,电沉积,延伸率
Abstract:
？研究了用电沉积方法制备的纳米ni和ni/sicp纳米复合材料的超塑特性,在试验温度410℃和450℃,应变速率为8.3x10-4s-1-5x10-2s-1的条件下,纳米ni和ni/sicp纳米复合材料均表现出超塑性.当温度为450℃、应变速率为1.67x10-2s-1时,在ni/sicp中获得最大延伸率为836%;在同样的温度下应变速率为1.67x10-3s-1时纳米ni获得最大延伸率为550%.对超塑性变形后组织的分析表明,晶界滑移是主要变形机制,晶粒长大至亚微米/微米量级后,变形机制是位错协调晶界滑移和位错滑移塑性.
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