Direct powder forging of PM nickel-based superalloy: densification and recrystallisation

A Comparison of the Plastic-flow Response of a Powder-metallurgy Nickel-base Superalloy (postprint)

Laser Cladding of Ultra-Thin Nickel-Based Superalloy Sheets

Laser cladding is a well-established process to apply coatings on metals. However, on substrates considerably thinner than 1 mm it is only rarely described in the literature. In this work 200 µm thin sheets of nickel-based superalloy 718 are coated with a powder of a cobalt-based alloy, Co-28Cr-9W-1.5Si, by laser cladding. The process window is very narrow, therefore, a precisely controlled Yb ...

Parametric optimization of powder mixed electrical discharge machining for nickel-based superalloy inconel-800 using response surface methodology

Background: Electrical Discharge Machining (EDM) is a well-established non-conventional machining process for the machining of electrically conductive and difficult-to-machine materials. But its applications are limited because of the slow machining rate and poor surface finish. Powder mixed EDM (PMEDM) is unitary of the recent progresses in the EDM process in which powder particles mixed in th...

Thermodynamics of densification of powder compact

This paper established a necessary condition for the sintering of powder compacts by examining the total free energy balance in terms of the particle size, neck size and contact number. The thermodynamic analysis of the proposed model clarifies the relation of shrinkage (q) of powder compact-contact angle (f)-relative density at a given dihedral angle (fe) of a grain boundary. Faster densificat...

Joining of nickel-base superalloy single crystals

Introduction ................................................................................................................................1 Overview of Weldability of Nickel-Base Superalloys..................................................................1 Crystallography............................................................................................................................