Study on Diffusion Welding (Report 6)

Diffusion Welding of Nickel-based Superalloys

Ni based superalloys can be welded by diffusion bonding. Temperature, diffusion coefficient, activation energy and Boltzmann constant influence the quality of diffusion bonding, so obtaining the best condition for welding is considered. Showing the suitable condition for diffusion welding of nickel-based superalloys is the aim of this paper.

A Study In Pattern - Welding

O DRING the past decade, metallurgists and other research workers have shown an increasing interest in the welding and forging techniques used in the manufacture of certain early European iron sword-blades. A number of detailed papers had been published on 'pattern-welding' by the I940s, but it was left to H. Maryonj r ) to recognize the practical problems involved and put the correct interpret...

Atomic diffusion behavior in Cu-Al explosive welding process

Study on Heating Mechanism in Ultrasonic Welding of Thermoplastics

Heating of workpieces plays an influential role in ultrasonic welding. In the present paper, an attempt was made to further understand the heating mechanism during ultrasonic welding. Three equations in this regard were derived. Firstly, based on the viscoelastic properties of the workpieces, the equation governing heat generation was derived. Secondly, a thermal equivalent circuit model was de...

Cold welding of gold nanoparticles on mica substrate: Self-adjustment and enhanced diffusion

From the images of HR-TEM, FE-SEM, and AFM, the cold welding of gold nanoparticles (AuNPs) on a mica substrate is observed. The cold-welded gold nanoparticles of 25 nm diameters are found on the mica substrate in AFM measurement whereas the size of cold welding is limited to 10 nm for nanowires and 2~3 nm for nanofilms. Contrary to the nanowires requiring pressure, the AuNPs are able to rotate ...