【摘 要】
：
Mechanical properties and microstructure of Al-Mg-(Sc, Zr) welded joint prepared by manual labor melt inert gas(MIG) welding method using Al-Mg and Al-Mg-Sc wel
【机 构】
：
School of Materials Science and Engineering,State Key Laboratory of Powder Metallurgy
论文部分内容阅读
Mechanical properties and microstructure of Al-Mg-(Sc, Zr) welded joint prepared by manual labor melt inert gas(MIG) welding method using Al-Mg and Al-Mg-Sc weld wire as filling materials were studied comparatively. The results show that the apparent recrystallization does not happen in heat-affected zone. It proves that Al-Mg(Sc,Zr) alloy has a high capability of resistance to welding heat-soften. Using Al-Mg-Sc welding wire as filling material can obviously refine the grains of weld seam and improve its strength. The layer of small equal-axe grains in fusion area improves the joint strength between welded metal and base metal. The coefficients of welded joints when Al-Mg-Sc and Al-Mg welding wire are used as filling material are greater than 0. 90, respectively. The yield strength of welded joints with Al-Mg welding wire is only 187 MPa, one is as high as 287 MPa with A1-Mg-Sc welding wire, thus the working strength of the welded unit is greatly improved.
其他文献
Based on classical terrain following (TF) algorithm (adaptive angle method), a new method for TF controller is proposed by using angle of attack. A method of ob
研究信息与均值-方差投资组合之间的关系.在L2框架和给定部分信息下,清楚地给出了均值-方差意义下的最优收益和有效前沿的表达式.为了刻画信息对投资组合的影响,引入了信息
With its wide use in different fields, the problem of the convergence of simple genetic algorithms (GAs) has been concerned. In the past, the research on the co
A comprehensive assessment index system was established. The mechanical recycling process of printed circuit board was evaluated according to the comprehensive
NiCrAlY + (ZrO2 + Y2 O3 ) thermal barrier coating was prepared on the surface of refractory steel 1Cr18Ni9Ti with plasma spraying technique. The phases and micr
By simulating edge dislocation emissions from a mode I crack tip along multiple inclined slip planes, the plastic zone and dislocation-free zone around the crac
Exchange current density of spinel LiMn2 O4 was studied by linear polarization. The relationship of the kinetic property with the structure of spinel LiMn2 O4 w
目的分析通海县克山病发病动态.方法连续5年对监测点3～14岁儿童进行临床、心电图、X线摄片等综合评定和病区人群发硒水平测定.结果 5年间无急型、亚急型克山病病人发生,监测中
This study analyzes drift phenomena of deterministic crowding and probabilistic crowding by using equivalence class model and expectation proportion equations.
内分泌干扰物质(EDC)又称环境激素是指影响和扰乱生物体内分泌系统的有害化学物质的总称.这些物质对生物生殖系统产生严重的影响,引起生殖系统病变.内分泌干扰物质的检测技术