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IMPROVEMENT ON FATIGUE LIFE OF ALLOY LY12CZ AFTER LASER RADIATION AND ITS DAMAGE EVOLUTION

ZO U Hongcheng DAI Shujuan QIAN Zhixiong LI Guangxia Huazhong University of Science and Technology , Wuhan , China [Originally published in ACTA METALL SIN(CHINESE EDN)25(3)1989 pp A207A212 , Associate Professor , Division of Materials , Huazhong University of Science and Technology , Wuhan , China

金属学报(英文版)

The change of microstructure of fatigue specimens before and after laser radiation was studied by transmission electron microscopy.The results show that the diameter of dislocation cell λ tends to a constant at fatigue failure.Based on the principles of continuous damage mechanics,expressions of the fatigue damage criterion and processes of fatigue damage evolu- tion for L Y12CZ have been derived.

关键词: laser radiation , null , null , null

螺旋机生产D212焊条的研究

邓火生 , 张婉云 , 龙昌茂 , 叶克力 , 蒋成刚 , 文铁生

材料开发与应用 doi:10.3969/j.issn.1003-1545.2009.04.010

详细地介绍了采用螺旋机生产的D212焊条的研究技术路线、焊条配方设计及焊条各项性能试验结果等.试验表明,螺旋机生产的D212焊条熔敷金属理化性能达到国标要求,焊条焊接工艺性能良好,并与油压机生产的同类型D212焊条处于同一水平.同时螺旋机生产的D212焊条外在质量好,生产成本低.

关键词: 螺旋机 , D212焊条 , 配方设计 , 理化性能

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