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J. Cent. South Univ. (2016) 23: 1858-1862 DOI: 10.1007/s11771-016-3240-8 Effect of a novel three-step aging on strength, stress corrosion cracking and microstructure of AA7085 CHEN Song-yi(陈送义)1, 2...: The influence of a novel three-step aging on strength, stress corrosion cracking (SCC) and microstructure of AA7085 was investigated by tensile testing and slow strain rate testing combined......
Investigation of Stress Corrosion Cracking Initiation of 7A52 Aluminum Alloy李奇Department of Equipment Remanufacture Engineering, Academy of Armored Forces Engineering摘 要:The stress corrosion cracking(SCC) behaviour of 7A52 aluminum alloy in air and in 3.5% NaCl solution was researched by slow strain rate test(SSRT) and SEM-EDS. The SCC susceptibility......
激光焊接过程中残留液体金属的高速高倍在线观察温鹏1,获崎贤二1,山本元道1(1.北京市清华大学机械工程系)摘 要:采用高速摄像机和光学显微镜构成的摄像装置对激光焊接熔池后端的凝固行为进行高速高倍摄像,详细记录了柱状晶从液态熔池后部析出过程以及残留在已析出柱状晶周围的液体金属的凝固行为.采用液体Sn急冷将焊接过程中正在凝固的焊缝金属冷冻保存到室温,并与高速高倍摄像观察到的熔池后端的凝固行为进行了对比分析.对3种奥氏体不锈钢材料焊缝凝固过程中残留液体金属的存在范围进行了观察和比较.在线观察到的残留液体金属是焊缝金属......
-zinc-magnesium-copper; grain refinement; stress corrosion cracking 1 Introduction In order to use wrought aluminum alloys for structural components, it is important to improve their mechanical... that the grain refinement of 7075 aluminum alloy sheets has a disadvantage on resistance to stress corrosion cracking (SCC) [3]. It would be difficult to establish a process that can achieve......
Microstructure Evolution and Cracking Control of 316L Stainless Steel Manufactured by Multi-layer Laser Cladding HU De-jin1,SUN Kang-kai1,DENG Qi-lin1,SONG Jian-li1,ZHOU Guang-cai1 (1.School... material was obtained. Cracking was eliminated by introducing of supersonic vibration and application of parameter adjustment technologies. 关键词:Laser cladding; 316L stainless steel; microstructure......
dispersive spectrometer (EDS) was used for component analysis. Results showed that Al content in magnesium alloy has an effect on hot cracking susceptibility. In addition, the nonequilibrium.... The liquefied Mg17Al12 were pulled apart and hot cracks formed at weld metal HAZ due to the augmented strain. Since AZ31 had half the Al content of AZ61, its hot-cracking susceptibility was lower than......
镍基合金焊接过渡区微观结构及应力腐蚀行为研究侯娟1,彭群家2,庄子哲雄2,王俭秋0,柯伟2,韩恩厚2(1.辽宁省沈阳市科学院金属研究所金属腐蚀与防护国家重点实验室2.日本东北大学 断裂与可靠性研究中心)摘 要:利用微观分析手段深入分析了镍基合金690-52同种金属焊接和镍基182合金-A533B低合金钢异种金属焊接的焊接过渡区微观结构,定量测量了同种金属焊接热影响区(HAZ)残余应变分布,用带缝隙的弯曲横梁样品模拟了异种金属焊接过渡区在高温含氧水中的应力腐蚀开裂(SCC)行为.结果表明,同种金属焊接过渡区的HA......
图13 JDMJ+x%YCl3精炼后流动性试样长度 Fig.13 Length of fluidity samples after refined by JDMJ (a), JDMJ+5%YCl3 (b) and JDMJ+10%YCl3 (c) 同样,未精炼的Mg-10Gd-3Y-Zr合金热裂倾向性因子(Hot cracking susceptibility... ceramic foam filter (CFF) and gas bubbling technology were described. The effects of composite purification technology (CPT) on the mechanical properties, fluidity and hot cracking were reviewed. At last......
Behavior of Stress Corrosion Cracking in a Magnesium Alloy宋仁国The MOE Key Laboratory of Mechanical Manufacture and Automation, Zhejiang University of Technology摘 要:Slow strain rate testing (SSRT) was employed to study the stress corrosion cracking (SCC) behavior of ZE41 magnesium alloy in 0.01 M NaCl solution. Smooth tensile specimens with different......
Evaluation method of cracking resistance of lightweight aggregate concreteJI Tao(季韬), ZHANG Bin-bin(张彬彬), CHEN Yong-bo(陈永波), ZHUANG Yi-zhou(庄一舟) (College of Civil Engineering, Fuzhou University, Fuzhou 350116, China)Abstract:The cracking behavior of lightweight aggregate concrete (LWAC) was investigated by mechanical analysis, SEM and cracking-resistant test where a shrinkage-restrained ring......