ISSN:
1662-9752
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
Friction stir welding (FSW) was applied to a 0.53% nitrogen stainless steel. The nitrogen contentchange and the microstructural evolution in the weld were investigated. The nitrogen content analysisrevealed that the stir zone (SZ) showed roughly the same nitrogen content as the base material (BM). Thisresult suggests that FSW is an effective welding process for keeping up nitrogen content of high-nitrogensteel weld. The microstructural observation showed that the weld had the BM, the SZ, the partiallyrecrystallized zone (PRZ) and the heat affected zone (HAZ). The coarse grain structure of the BM changed torelatively fine microstructure of equiaxially recrystallized austenite grain structure in the SZ during FSW. ThePRZ contained both the fine and coarse grain structures. The detailed TEM observations showed that theparticles with about 11m in size were present in the advancing side of the SZ both along grain boundaries andgrain interiors. The Cr nitride less than 100 nm was formed in the HAZ along grain boundaries, whichindicates that a slight sensitization occurred in the HAZ during FSW
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/02/15/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.539-543.3757.pdf
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