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Critical review of joining processes for powder metallurgy parts

EuroPM2008 International Powder Metallurgy Congress and Exhibition
(29 September - 1 October 2008) Mannheim, Germany

Powder metallurgy (PM) processes have high productivity and are ideal for making near net-shape parts of especially complex geometries from a range of materials, which maximises material utilisation, and hence minimises or eliminates secondary operations such as machining. Secondary operations are common for components made via liquid metal processing, and result in an additional step in manufacturing with substantial cost and waste implications. Despite this obvious advantage of PM processes, however, the joining of materials synthesized from powders has been associated with difficulties related to their inherent characteristics, such as porosity, contamination and inclusions, at levels, which tend to influence the properties of a welded joint.

This paper presents a critical review of the current state-of-art of welding PM components. It also seeks to identify preferred joining processes and identify apparent technology gaps in joining of PM parts, in terms of initial processing and attendant materials issues, with an emphasis on offering solutions to welding problems.

For full paper, click here

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Joint Arc Welding and Pressure & Process Plant Technical Group Meeting
'Weld repairs in ageing plants'

8 October 2008, Abington

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WJS Materials Technical Group Meeting

(Jointly with the Younger Members Committee of The Welding Institute)

Materials Issues in Weld Integrity

Thursday 27 November 2008
TWI Conference Centre, Granta Park, Cambridge

Chairman: Dr Peter Boothby - Advantica
Secretary: Dr Cem Selcuk - TWI

Speakers from Industry and Academia include:

JCB
Joy Mining
Corus
Cranfield University

Agenda

Weld integrity has always been an important materials issue, especially in applications, involving arduous loading conditions, including off-road vehicles, mining, aerospace, pipelines and process plant. Considerable progress has been made in improving the performance of existing materials and structures. This has been achieved by developing advanced technology solutions that could meet the requirements of increasingly demanding applications and severe operating conditions. As there is a strong demand for creating light-weight materials and structures, with an aim to reduce the carbon footprint of materials and processes, the integrity of welded joints has become a critical materials and design issue in developing reliable, high performance components and structures. This one day event, open to everyone, brings together experts and pioneers from both industry and academia, with the aim of capturing the state-of-art and issues in weld integrity, through presentations and discussions. The programme will be an ideal opportunity for sharing information on new research and development. It will also provide a useful forum for networking and gaining an insight into this important technical area.

For further information when available, please contact rachel.wall@twi.co.uk

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WJS Branch Events (October / November)

New technology in gases
The Connaught Hotel, 40-56 Tettenhall Road, Wolverhampton WV1 4SW
Monday, 10 November 2008

Fitness-for-Service of Welded Structures
Joint Meeting with Institute of Physics
By: Eur Ing Isabel Hadley, TWI Ltd
IOP, 76 Portland Place, London W1B 1NT
Wednesday, 26 November 2008

For further information, please contact twi_professional@twi.co.uk

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