Abstract
In the current study, dynamic strain ageing (DSA) phenomena in 316L austenitic stainless steel was investigated under as-received and as-welded conditions. A tensile test was carried out on as-received and as-welded samples for the temperatures of 25–800 °C at a strain rate of 1 × 10−3 s−1. Microstructure and fracture surfaces were investigated by optic and scanning electron microscopes (SEM). 316L austenitic stainless steel showed different DSA behavior under as-received and as-welded conditions, which are discussed in terms of microstructure and mechanical properties.
Highlights
Austenitic stainless steels are the most important types of stainless steels which are known as nonmagnetic, formable and weldable
316L austenitic stainless steel and AS MIG 316LSi welding wire in diameter of 1.2 mm were used in the present study
The results indicated that as-welded samples are more susceptible to dynamic strain ageing (DSA) than as-received samples
Summary
Austenitic stainless steels are the most important types of stainless steels which are known as nonmagnetic, formable and weldable. They are used from cryogenic temperatures to the hot temperatures of furnaces and jet engines. 316 type austenitic stainless steels contain molibdenium which increases corrosion resistance and strength at high temperatures. In several reported cases, cracking was observed in the heat-affected zone (HAZ) and as-received metal of the weld joint. The thermally dramatic act of casting a small amount of metal as in each weld run can severely alter the microstructure and toughness of the parent steel in the HAZ, locally changing the original tough parent steel into a less tough and sometimes brittle material. Stresses may be sufficient to cause local plastic strain around the weld [4]
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
