检索结果-南通市图书馆

Stirring brazing of dissimilar al/Mg alloy without flux in air

在线全文

学校读者我要写书评

暂无评论

引用

Rare Metals 2013年第5期32卷 469-474页

作者： Hui-Bin Xu Hui-Bin Sun Hong-You Chen School of Materials Science and Engineering Chongqing University of Technology Chen State Key Laboratory of Advanced Welding and Joining Harbin Institute of Technology

AZ31B magnesium alloy and 2024 aluminum alloy were successfully jointed at aid of mechanical stirring with Sn-Zn-al filler metal. The microstructure, fracture morphologies, and mechanical properties of joint were investigated. The results show that Mg-al intermetallic compounds can be avoided by the process. But, a small quantity of porosity is found in the joint. The sheafing strength of joint interface adjacent to magnesium alloy is 35.4 MPa for formation of Mg-Sn intermetallic compounds, which is about 46 % of that of filler metal. While, the shearing strength of joint interfaces adjacent to aluminum alloy is 70.4 MPa for formation of Zn-Sn-al solid solution, which is about 92 % of that of filler metal.

关键词： 2024 al alloy AZ31B Mg alloy Stirring brazing

Microsegregation and Improved Methods of Squeeze Casting 2024 aluminium alloy

在线全文

学校读者我要写书评

暂无评论

引用

Journal of Materials Science & Technology 2003年第5期19卷 413-416页

作者： Yong ZHONG, Guoyue SU and Ke YANGThe National Engineering Research Center, the Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China Natl. Eng. Res. Ctr. Inst. of Metal Res. Chinese Acad. of Sci. Shenyang 110016 China

The squeeze casting of a 2024 al alloy was carried out to investigate the effect on microsegregation in the alloy of the application of pressure followed by diffusion annealing. The experimental results indicate that an optimum applied pressure followed by an optimum diffusion annealing process can markedly reduce the degree of microsegregation and improve the mechanical properties to a degree that can approach the level of forged 2024 al alloy.

关键词： 2024 al alloy Squeeze casting Microsegregation Diffusion annealing

STUDY ON MICRO-PLASTIC DEFORMATION BEHAVIOR OF 2024 A1 alloy

在线全文

学校读者我要写书评

暂无评论

引用

Acta Metallurgica Sinica(English Letters) 2000年第2期13卷 502-507页

作者： F. Yang, C. H. Wu and D. L. Sun School of Materials Science & Engineering, Harbin Institute of Technology, Harbin 150001, China

Dimensional stability properties of hot extruded 2024 al alloy bar in T4 and T6 aging states and dif- ferent extruded directions were investigated by testing micro-yield strength (MYS), stress relaxation resistance (SRR), and dimensional change in thermal cycling and unloading *** results show that micro-plastic deformation resistance in longitudinal(parallel to the axis of the extruded bar) direction is higher than that in transverse(perpendicular to the axis of the extruded bar) direction. Testing in short-term loading condition MYS value corresponding to micro-plastic strain of 1 *10m^(-5)in longitudinal direction is 1.4 times than that in *** with the results of MYS and dimensional change in thermal cycling and unloading conditions, the values in T6 state are higher than that in T4 state. Using TEM the microstructures before micro-plastic deformation were *** analyses confirm that stability of thermodynamics condition and dislocation results in dimensional stability of the alloy.

关键词： 2024 al alloy dimensional stability aging micro-yield strength stress relaxation