alexa

GET THE APP

Review and Analysis of Powder Prior Boundary (PPB) Formation in Powder Metallurgy Processes for Nickel-based Super Alloys | OMICS International | Abstract
ISSN: 2168-9806

Journal of Powder Metallurgy & Mining
Open Access

Our Group organises 3000+ Global Conferenceseries Events every year across USA, Europe & Asia with support from 1000 more scientific Societies and Publishes 700+ Open Access Journals which contains over 50000 eminent personalities, reputed scientists as editorial board members.

Open Access Journals gaining more Readers and Citations
700 Journals and 15,000,000 Readers Each Journal is getting 25,000+ Readers

This Readership is 10 times more when compared to other Subscription Journals (Source: Google Analytics)

Review Article

Review and Analysis of Powder Prior Boundary (PPB) Formation in Powder Metallurgy Processes for Nickel-based Super Alloys

Bai Q1*, Lin J1, Tian G2, Zou J2 and Dean TA3

1Department of Mechanical Engineering, Imperial College London, London SW72AZ, UK

2Beijing Institute of Aeronautical Materials, Beijing 100095, China

3Departments of Mechanical Engineering, University of Birmingham, Birmingham B15 2TT, UK

*Corresponding Author:
Bai Q
Department of Mechanical Engineering
Imperial College London, London SW7 2AZ, UK
Tel: +44 (0)20 75949078
E-mail: [email protected]

Received Date: January 01, 2015; Accepted Date: March 31, 2015; Published Date: April 07, 2015

Citation: Bai Q, Lin J, Tian G, Zou J, Dean TA (2015) Review and Analysis of Powder Prior Boundary (PPB) Formation in Powder Metallurgy Processes for Nickelbased Super Alloys. J Powder Metall Min 4:127. doi: 10.4172/2168-9806.1000127

Copyright: © 2015 Bai Q, et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

Abstract

Powder metallurgy of nickel-based super alloys have been developed and used for a wide range of products, owing to their excellent high temperature rupture life, creep strength and fatigue crack growth resistance. Typical processes for high performance PM super alloys include hot isostatic pressing (HIPing), hot extrusion and hot isothermal forging. Hot isostatic pressing is normally conducted at a high temperature by using metal forming standards at low pressure for a long time. However an intrinsic problem, i. e. powder prior boundary (PPB) precipitate networks, can occur in the HIPing process. In this paper, a comprehensive review of PPB formation in the powder metallurgy of super alloys is presented. Research on PPB formation process from room temperature to high temperature and during HIPing, has been reviewed and PPB formation mechanisms are discussed. Methods to reduce PPB effects on the mechanical properties of nickel-based super alloys, including heat treatment, changing the proportions of composition elements, and plastic deformation to break up the PPB networks, are reviewed.

Keywords

Top