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 102/1979
By S Elliott, E R Wallach and I A Bucklow
Background
A study of the interface surfaces of fractured diffusion bonds in a mild steel was made in order to further understanding of the mechanisms of bond formation and of the mechanical properties of such bonds. The results show that parent-metal tensile strengths are achieved with some 20% of the interface still unbonded and that these unbonded areas are present as grooves rather than as isolated voids as had previously been thought. The relative orientation during bonding of any directional surface finish on the two component halves affects the geometry of the unbonded grooves and, to a slight extent, the resultant tensile strengths. The results also suggest that tensile testing alone is not a sufficient criterion by which bond quality should be assessed; impact or fracture toughness testing also must be considered.