Self-welding susceptibility of 316LN and alloy D9 stainless steels in high-temperature flowing sodium

Effect of cold-work on self-welding susceptibility of austenitic stainless steel (alloy D9) in high temperature flowing sodium

“…4. The test results of 304 and 321 stainless steel of Yukota [4] and 316LN obtained from our earlier study [7] fall in same line as shown in Fig. 4.…”

“…4. Linear relationship established between W and t ½ with test results of duration 6 and 9 months [7] seems to hold even for test of 4.5 month duration carried out at higher contact stress. Since annealed alloy D9 did not show self-welding, the corresponding variation for these specimens will be as shown in Fig.…”

“…This is due to variations in the actual contact area at the asperities of the mating surfaces of the specimens during loading [7]. The pair with relatively minimum contact area at the asperities of the mating surfaces experiences high contact stress and gets self-welded.…”

“…After the completion of the test, specimens that are self-welded were separated using a setup as shown in Fig. 3 which consists of mechanical vice, bolt nut, disc springs and load cell with which the breakaway force required to separate them can be measured [7].…”

“…Agastini has studied self-welding in 20% cold-worked AISI 316 stainless steel [5]. Recently self-welding studies on annealed and cold-worked alloy D9, and 316LN austenitic stainless steel [6,7] were reported by our team.…”