Alert: Export Control Check Required
Thank you for requesting a TWI Industrial Members Report.
To meet UK government requirements, your request will undergo an Export Control Check. This process reviews the technical content of the report, identifies the end user, and addresses any concerns.
Please submit your request to CRP@twi.co.uk including your name, member company that you work for and your location. We will contact you regarding the request within 2 working days and any additional information required to complete the necessary checks.
We look forward to receiving your request and processing it through our export control procedure.
Thank you,
TWI CRP Operations Team
This content is only available to Industrial Members, Find out how to become a Member of TWI.
TWI Industrial Member Report Summary 373/1988
By T G Gooch and B J Ginn
Background
Low carbon 12%Cr steels with a duplex martensite-ferrite structure have been developed to give improved corrosion resistance over common structural steels. However, such alloys tend to transform to ferrite in the high temperature heat affected zone (HAZ) of fusion welds, with resultant grain growth and reduction in toughness. The present work examined the effects of varying arc energy and of reheating during multipass welding on HAZ structure and toughness of representative commercial alloys.
Manual metal arc (MMA) butt welds and simulated samples were produced from 12mm plate, and HAZ Charpy V notch impact tests to BS 131: Part 2: 1972 were carried out over a range of temperature. All samples were tested in the as-welded condition. Metallographic and fractographic examination were undertaken.