Nanomechanical responses of intermetallic phase at the solder joint interface - Crystal orientation and metallurgical effects

► Textural and alloying effects on mechanical behavior of Cu6Sn5 are explored. ► Orientation dependence on elastic behavior of Cu6Sn5 is verified and explained. ► Allotropic transition and plastic ability for Cu6Sn5 are linked. ► How alloying affects the hexagonal to monoclinic transition of Cu6Sn5 is proposed.