Aluminum alloys of the 6xxx series which contain excess Si or Cu are well used for the automotive applications because of the high age-hardening response. The effect of addition of small amount of Sn on the two-step aging behavior in 1.2%Mg2Si-0.5%Si in excess alloy and 1.2%Mg2Si-0.7%Cu alloy was investigated by means of hardness measurement, differential scanning calorimetry, and transmission ...

In the paper, genetic algorithm is introduced in the study of network authority values of BP neural network, and a GA-NN algorithm is established. Based on this genetic algorithm-neural network method, a predictive model for fatigue performances of the pre-corroded aluminum alloys under a varied corrosion environmental spectrum was developed by means of training from the testing dada, and the f...

Burnishing is a chip-less finishing process, in which a hard roller or ball presses the surface layer of part to perform plastic deformation in the surface layer and produce improved finish, enhanced hardness and compressive residual stresses on the surface of special materials such as Aluminum and Brass. In the following research, the effect of input parameters such as feed rate, cutting speed...

nowadays, equal channel angular pressing, known as the ecap process, is one of the most popular methods for manufacturing ultra-fine grained (ufg) materials. in this paper, ecap process has been carried out on pure copper and 6012 aluminum alloy up to six passes by route . principal attention was paid to the influence of parameters such as diameter, material, and the height of billet on mechani...

It has been proposed that with the appropriate models, instrumented indentation test (IIT) data can be reduced to yield the uniaxial stress–strain behavior of the test material. However, very little work has been done to directly compare the results from uniaxial tension and spherical indentation experiments. In this work, indentation and uniaxial tension experiments have been performed on the ...

The working principle of scanning acoustic microscope (SAM) is introduced, and the acoustic transmission action is analyzed according to the geometrical and structural characteristics of explosive/Aluminum-alloy binding. The adhesive status of the interface in some typical parts of the binding is detected by SAM and 30MHz ultrasonic focal field lens. The results show that the interfaces between...

In this investigation, the effect of friction stir processing (FSP) parameters such as rotational speed, traverse speed and plunge depth on the tensile strength of AA6063 aluminum alloy was studied. The experiments were carried out as per response surface methodology parametric design concepts to study the influence of various combinations of process parameters. Statistical optimization techniq...

The technological development of all kinds of lightweight transportation devices including vehicles, aircraft, ships, etc. has progressed markedly with the demand for energy saving and environmental protection. Aluminum alloy is in the spotlight as it is a suitable environmentally friendly material. However, deformation is a major problem during the welding process because aluminum alloy has a ...

A grinding force model is developed to predict the forces during the face grinding of cast iron and aluminum alloy 319. Design of experiments methods are used to create a response surface of four process parameters: feed rate, inclination angle of the grinding wheel profile, offset angle between the grinding wheel and the workpiece, and the peripheral speed of the wheel. For each material, thre...

The amorphous ternary metallic alloy Zr60Al15Ni25 was oxidized in dry oxygen in the temperature range 310 ±C to 410 ±C. Rutherford backscattering (RBS) and cross-sectional transmission electron microscopy (TEM) studies suggest that during this treatment an amorphous layer of zirconium-aluminum-oxide is formed at the surface. Nickel was depleted in the oxide and enriched in the amorphous alloy n...