金属材料疲劳及性能恢复的仿生研究

The effect of high-density electropulsing on the structures and properties of metallic material was studied. The mechanism of the effect on dislocation structures of electropulsing was discussed. The mechanical properties and fatigue-life of some engineering-materials was improved. A bio-inspired method to enhance the toughness of brittle nano-structure materials was advanced. The effects of thermal and mechanical energy on the fatigued materials were also studied. The evolution of dislocation configurations under fatigue loading and its recovery after thermal energy input were studied in detail.

人们一般不向材料补充物质与能量，任其承受载荷，积累损伤，直至产生裂纹而断裂。生物体不断补充物质和能量，寿命可延长数千倍。我们可模仿生物的机能恢复和创伤愈合，向试样施加高密度电流脉冲，使其疲劳寿命等显著提高，探索材料性能恢复和损伤愈合的仿生处理新途径。脉冲处理虽非仅见，但材料仿生处理概念的全面提高，尚未见国内外其他报导。