Abstract: The high cooling rates normally encountered in the application of high intensity welding processes such as laser beam welding is often detrimental to the weldment, especially for high hardenability ...

Abstract: The formation of cold cracks during welding of high strength steels is almost always preceded by martensite formation. Real time detection of both the martensite and cracks formed is a basic ...

Abstract: A relationship developed earlier between acoustic emission signals and the process of athermal martensitic transformation based on the free energy associated with the process is extended and ...

Abstract: Ultrafast lasers of subpicosecond pulse duration have thus far been investigated for ablation, drilling, and cutting processes. Ultrafast lasers also have the potential for laser welding of small ...

Abstract: Ultrafast lasers of subpicosecond pulse duration have the potential for laser microwelding of micronscale fusion zone. Due to the extremely short pulse duration, laser-metal interaction involving ...

Abstract: Martensitic transformation occurs in a diffusionless manner at high velocity, with acoustic emission (AE) being generated during the process. The AE signal contains information about the dynamic ...

Abstract: The response of conduction mode laser weld pool dimensions, specifically weld width, to a step change in power input has been modeled using two-dimensional heat flow analysis. The goal is to ...

Abstract: A new concept is introduced to model the main effect of tool wear on system dynamics during stable cutting. Audible sound generated from the cutting process is analyzed as a source for ...

Abstract: Theoretical relationships have been drawn between acoustic emission (AE) and the metal cutting process parameters by relating the energy content of the AE signal to the plastic work of deformation ...

Abstract: The dynamics of the cutting process is modeled for investigating the relationship between tool wear and sound generation during surface turning. The vibration of the tool holder, together with ...