Abhishek Sharma, Yasuhiro Aoki, Amlan Kar, Yoshiaki Morisada, Kohsaku Ushioda, Masaaki Nakai, Hidetoshi Fujii
• First-time LFW investigation of Haynes 282 Ni superalloy at 100–500 MPa. • Joints achieved 100% efficiency with fracture in the base metal. • High pressures (300, and 500 MPa) promote grain growth and twinning during PWHT. • Stored strain energy dominates the driving force during PWHT.