Abstract
Only a few studies have been made on the secondary defects in quenched austenitic stainless steels in contrast to a large number of studies on the secondary defects in quenched non-ferrous metals and alloys, especially in aluminum alloys. Recently Rowcliffe and Nicholson 1 have made a quench experiment of austenitic stainless steels and found a few types of secondary defects in a phosphorus bearing austenitic stainless steel. During the course of our investigation on the precipitation of dichromium nitride, CraN , in a high chromium-high nickel austenitic stainless steel containing more than 0.3 wt pct nitrogen, 2 new secondary defects other than those found by Rowcliffe and Nicholson were found in austenitic stainless steels. A prel iminary observation on these secondary defects is presented in this communication. The steel was melted and cast into an ingot of 3 kg under 10 atm pressure of nitrogen with commercial ly high purity in a h igh-pressure melting furnace, s The ingot was forged to a bar whose c ross section was 13 x 13 mm a. The composition of the steel is given below:
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