The results indicated that the microstructure, mechanical properties, oxidation resistance, growth resistance and thermal fatigue resistance were improved obviously.
结果表明，显微组织、抗氧化、抗生长及热疲劳抗力等性能，均有显著的改善和提高。
The fatigue resistance of the butt welds can be improved by means of removing the weld reinforcement and designing the weld in the maximum shear stress plane.
去除焊缝余高或将焊缝设计在最大剪应力平面内可明显改善对焊接头的疲劳性能。
The properties of crack resistance, impact resistance, frost resistance and fatigue resistance of cement were improved by adding polypropylene fiber.
在混凝土中掺加聚丙烯纤维能有效地提高混凝土材料的抗裂性、抗冲击性、抗冻性能、改善混凝土的抗疲劳特性。
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