en گروه سرامیک Ceramic Materials and Engineering Research Paper Research Paper <span lang="EN-IN" style="font-size:12.0pt"><span style="line-height:115%"><span new="" roman="" style="font-family:" times="">Dissimilar joints of AA2219 and Ti-6Al-4V alloys are obtained using the vacuum diffusion bonding method. The bonding pressure is controlled in the range of 1-4 MPa by keeping the bonding temperature and holding time constant. The influence of the bonding pressure on the microstructure and mechanical properties of the bonding joints is investigated. The diffusion behaviour across the interface of the bonding joints is increased with the increase in bonding pressure. The interface morphology of the specimen bonded at lower bonding pressures exhibits scraggly voids and cracks. The irregular voids and cracks are squeezed and gradually closed due to the significant increase in the diffusion between Al and Ti. The maximum shear strength of 81 MPa is obtained for the joint made at the bonding pressure of 4 MPa, and a diffusion layer of 0.76 &micro;m is formed at the Ti side interface. The fracture morphology inferred the brittle failure of the bonding joints due to the formation of intermetallic compounds like TiAl, TiAl₂, and TiAl₃ at the interface of Al and Ti.</span></span></span> AA2219,vacuum-diffusion,interface and fracture morphology,microstructure,mechanical property. 78 91 http://ijmse.iust.ac.ir/browse.php?a_code=A-10-4965-4&slc_lang=en&sid=1 Manjunath Vatnalmath vmanjunathsit@gmail.com 1800319475328460021124 1800319475328460021124 No Department of Mechanical Engineering, Siddaganga Institute of Technology, Tumakuru, Karnataka, India Virupaxi Auradi vsauradi@gmail.com 1800319475328460021125 1800319475328460021125 No Department of Mechanical Engineering, Siddaganga Institute of Technology, Tumakuru, Karnataka, India Bharath Vedashantha Murthy bharathv88@gmail.com 1800319475328460021126 1800319475328460021126 No Department of Mechanical Engineering, RNS Institute of Technology, Bangalore,Visvesvaraya Technological University, Karnataka, India Madeva Nagaral madev.nagaral@gmail.com 1800319475328460021127 1800319475328460021127 No Aircraft Research and Design Centre, HAL, Bangalore-560037, Karnataka, India Veeresh Kumar G B veeru232@gmail.com 1800319475328460021128 1800319475328460021128 Yes Department of Mechanical Engineering,National Institute of Technology - Andhra Pradesh,Near National Highway No. 16, Kadakatla,Tadepalligudem – 534101 Suresh Shetty 1800319475328460021129 1800319475328460021129 No Department of Mechanical Engineering, Nitte (Deemed to be University), NMAM Institute of Technology (NMAMIT), Nitte-574110, Karnataka, India SURESH SHETTY 1800319475328460021130 1800319475328460021130 No Department of Mechanical Engineering, NMAM Institute of Technology, Nitte, Karkala Taluk, Udupi - 574110. Karnataka, India