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Mg-Zn合金时效过程中GP区析出的热力学分析王晓亮1,李长荣1,郭翠萍1,杜振民1,何维1(1.北京市北京科技大学材料科学与工程学院)摘 要:利用显微硬度,XRD及TEM分析了Mg-1.9Zn(原子分数,%)二元合金时效硬化现象及GP区的形态和出现的温度范围.研究结果表明:在343和383 K时效过程中,过饱和固溶体中发生Zn原子偏聚,形成形态不同的GP区;在423 K时效,硬化峰值出现较早,没有典型GP区出现.利用本文优化获取的镁基固溶体相的热力学参数,给出镁基过饱和固溶体存在亚稳态溶解度间隙和溶质原子偏聚......
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文献标识码:A Seawater corrosion behavior of hot dip coatings at Qingdao test station (Ⅲ)--Splash zone LI Yan1, XING Shao-hua1, LI Xin2, WEI Xu-jun2 (1. Institute of Oceanology... (GI), Galfan (GF) and Galvalume (GL) coated steels exposed to splash zone of Qingdao site was investigated with seawater corrosion test and microscopy morphology analyses. Splash zone is less aggressive......
;钨极氩弧焊;显微组织;元素分布;熔合区 中图分类号:TG 457.19 文献标志码:A Microstructure of welding zone of super-Ni laminated composite and 18-8 steel TIG joint XIA Chun-zhi1, LI Ya-jiang1, 2, U.A.... with filler alloy by tungsten inert gas welding (TIG). The microstructure, microhardness and element distributions in the welding zone were analyzed. The results show that a valid connection forms between......
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文献标识码:A Seawater corrosion behavior of hot dip coatings at Qingdao test station (II)-Tidal zone LI Yan1, XING Shao-hua1, LI Xin2, WEI Xu-jun2 (1. Institute of Oceanology...), Galfan (GF) and Galvalume (GL) coated steels exposed to seawater tidal zone of Qingdao site was investigated with seawater corrosion test and microscopy morphology analysis. Biofouling takes place......
:TG456.7 文献标志码:A Laser weld forming of ultrathin NiTiNb shape memory alloy and microstructure and properties of heat-affected zone LU Wei-wei1, CHEN Yu-hua1, 2, HUANG Yong-de1, FU..., then the transformation law about the microstructure of heat-affected zone and mechanical properties of the welding joint were analyzed. The results indicate that a perfect welding joint needs a good match......
was proposed according to the slip zone integrity index calculated through quantitative analysis of deep displacement monitoring data of landslides based on landslide peak strength and residual... that the shear strength parameters of Wuchiba landslide in the chosen calculation conditions by the proposed method are as follows: the cohesion and internal friction angle of slip zone above water are 27.99 kPa......