Abstract
Thefactors determining particulate segregation and joint shear strength in transient liquid phase (TLP) bonded aluminium based metal matrix composite (Mj1C) material are examined in the present paper. Three situations are evaluated during TLP bonding, namely, where the liquid width is unrestrained at the bonding temperature, where the liquid width is maintained constant, and where liquid is continuously expelled from the bondline region during the joining operation. Similar experimental and numerically calculated liquid width values are found during unrestrained liquid width TLP bonding (at the start of the isothermal solidification period). However, the calculated rate constant during isothermal solidification is smaller than in experimental testing. When liquid is expelled from the joint interface during TLP bonding at 853 K, the liquid width attains a constant value of ~55 μm. Although the completion time for isothermal solidification is substantially decreased when liquid is expelled from the joint interface, particulate segregation is still observed in joints produced using 15 and 25 μm thick copper insert metals. Particulate segregation could only be prevented through the use of very thin (<15 μm) copper insert metals. Joint shear strength increases when the thickness of the copper insert metal is decreased and when the applied load increases during liquid expulsion bonding. Higher joint shear strength results from decreased particulate segregation in completed joints.MST/2037
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.