Microstructure and mechanical properties’ modification of friction stir welded Invar 36 alloy joint

Abstract

A novel approach named large-load and low-speed friction stir welding was developed to joining Invar36 alloy. The stir zone was characterised by a mean grain size of 0.7 µm and high angle boundaries of 90.7%. Abundant twin boundaries were produced in the grains as well. The grain refinement mechanism is attributed to the combination of discontinuous dynamic recrystallisation and microshear-bands-assisted dynamic recrystallisation. A good combination of strength and ductility was achieved. This work provides a new insight for joining face-centred cubic metals or alloys with higher melting points, such as austenite stainless steel and Ni-base alloys.

Investigation of the wear behavior of FeNi36 alloy cut by WEDM method under different loads

“…Because it has a similar coefficient of thermal expansion to composite materials, it is also used in areas where composite materials are present (Zhan et al , 2016). It is also used in many fields such as storage and transportation of liquefied natural gas (Xu et al , 2019), new Jammes Webb space telescope backplane fittings and interfaces (Lores et al , 2022), metrological instruments, optical devices, advanced composite molds for aerospace industry, temperature regulators, commercial laser interferometers, radar and microwave cavity resonators and special electronic enclosures (Khanna et al , 2018). Surface quality is an important parameter in such critical applications (Ulutan ve Ozel, 2011).…”