Friction stir welding in progress on two plates of MA956 ODS steelClick image to enlargeThe Welding Institute (TWI) in Cambridge, United Kingdom, has successfully joined oxide dispersion-strengthened (ODS) steel, a metarial considered unweldable using conventional fusiion methods.

Detail of the surface of friction stir welded MA956 showing a smooth high quality butt weldClick image to enlargeTWI is a research and technology organization with a focus on materials joining and engineering processes. In a recent press release, it notes that TWI was asked to friction stir weld samples of these steels as part of a PhD project by Huw Dawson of Manchester University in the UK.

These specialised alloys have been developed to deliver excellent strength and creep performance at elevated temperatures, making them suitable for applications in nuclear reactors and power generation equipment, where they are exposed to extreme heat.

These steels derive their properties from a distribution of fine particulates, usually ceramic-based, which impede deformation and so give the steel its strength and resistance to creep. Unfortunately, conventional fusion welding techniques destroy these strengthening particulates, preventing the steel from being effectively fabricated.

Being a solid-state process, friction stir welding does not melt the steel being joined and would therefore allow ODS steels to maintain their properties after fabrication.

A number of samples of MA956, embedded with thermocouples to monitor process temperatures, were successfully welded at TWI’s Yorkshire Technology Centre. These samples are now undergoing extensive testing at Manchester University, to assess their performance in hostile environments, including their susceptibility to irradiation damage. It is believed that the friction stir welding process, besides being able successfully to weld ODS steel, may also render it less prone to hydrogen cracking – a significant advantage for welds operating in a nuclear environment.

For more information on the research and the results of the recent friction welding project, contact TWI.

ESAB initiatives support welding education for students

ESAB Welding & Cutting has implemented three initiatives that will help support welding education in schools, including a welding contest open to schools in Canada and the US.

GM Canada commits to job support for Oshawa assembly workers

GM Canada says it plans to provide financial support to the close to 3,000 workers who will be losing their jobs at the Osahwa, ON, assembly plant when it closes in 2019.

GE Canada investing $238 M in automation at Quebec plant

GE Canada has announced it plans to invest $238 million in its Quebec subsidiary, GE Aviation, to modernize its plant in Bromont, QC.

Fueling the Force

by Noelle Stapinsky

Cultivating and managing a healthy workforce can be a key differentiator in today’s competitive landscape

Cut, Fabricate, Weld

CanWeld 2016 is a premier conference and exhibition for Canada’s fabricating and welding industries

Ontario invests $55 M for skills training

The Ontario govvernment is adding $55 million to apprenticeship training initiatives that will include programs to raise awareness about careers in the skilled trades.

Keeping your Cool

by Michael Ouellette

Many factors go into deciding between water-cooled and gas-cooled welding torches

Cutting, welding online data management

ESAB Welding and Cutting has introduced CutCloud online data management system and has unveiled advancements in its WeldCloud online data management system, including the ability for these software programs to bi-directionally share data, as well as incorporate gas management information.

Breaking Additive Manufacturing Barriers: A Bigger Build

New robotics-enabled technology promises to break some major additive barriers

CMTS keynote: Why Canada is a great place to grow a manufacturing business

Canadian manufacturers can compete and win on a global scale if they devote themselves to innovation in their products and processes, and efficiency in their operations. That’s the message from the keynote speaker at the Canadian Manufacturing Technology Show (CMTS) Linda Hasenfratz, CEO Linamar Corp.

Ultrafast Lasers Offer Great Promise as a Unique Manufacturing Tool

By Geoff Shannon, Amada-Miyachi America

Ultrafast or ultra-short pulse lasers offer unique material processing possibilities, because the laser’s pulse duration is less than the target material’s conduction time. Essentially this means that cold machining of parts is possible–with material being removed by sublimation.

Die & Mould Sector Report 2017: Winning the Game

by Andrew Brooks

Innovation support, skilled labour top the list of challenges for mouldmakers

Choosing a welding helmet

by Jamy Bulan

Balancing safety, productivity and comfort

Job Shops - Quebec - Going nuclear

by Tim Wilson

Shifting focus on the growing nuclear energy industry

Long lasting MIG consumables for heavy applications

ESAB's Velocity MIG consumables last five to six times longer in heavy fabrication applications.

Stay In Touch

twitter facebook linkedIn