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OALib Journal期刊
ISSN: 2333-9721
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晶粒尺寸对纳晶材料断裂韧性的影响
, PP. 53-56
Keywords: 纳晶材料,旋转变形,裂纹强度因子
Abstract:
建立了一个描述在纳晶材料中特殊旋转变形对裂纹钝化的影响的晶粒相关理论模型。特殊旋转变形由裂纹尖端的应力集中来驱动。由于特殊旋转变形导致临界裂纹强度因子增加，从而达到裂纹的钝化作用。计算了裂纹强度因子与晶粒尺寸的关系，结果显示由于晶粒的特殊旋转变形，使临界裂纹强度因子最大增加到50%。
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