The anisotropy and it's evolution during ageing treatment for Al-Li alloy 1420 cold-rolling sheet were investigated by means of tensile test and fractograph observation.
通过力学性能测试和断口形貌观察，研究了1420铝锂合金冷轧薄板的各向异性及其在时效过程中的演化规律。
Though polyurethane leather with its characteristic advantages of resistance to oil, abrasion, cold, flexion, and good mechanical strength, it has disadvantage of easily ageing.
聚氨酯合成革有耐油、耐磨、耐寒、耐屈曲、机械强度好等优点，但也容易发生老化。
The strain ageing of cold-rolling ribbed bar leads to high strength and drop of elongation, so this seriously affects the quality of concrete component and regular production of the bar.
冷轧带肋钢筋应变时效导致钢筋强度升高，延伸率下降，严重影响钢筋混凝土构件质量及生产厂家的正常生产。
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