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:
The effects of chemical composition, cold rolling and subsequent annealing parameterson the reversion of strain-induced martensite to austenite were investigated in three experimentalMn and Si-free Cr-Ni austenitic stainless steels and two commercial Type 301 and Type 301LNgrades by optical and electron microscopy, X-ray diffraction and magnetic measurements.Hardness and tensile tests were performed to determine the mechanical properties achieved. Incold rolling, completely martensitic structure could be obtained in the experimental heats, but onlypartially in 301 and 301LN grades at reasonable reductions. Upon annealing, in 301LN thereversion took place by the nucleation and growth mechanism, and submicron austenite grainswere formed within a few seconds at temperatures above 700°C. In the other steels, reversion tookplace by the shear mechanism, and ultra-fine grains were formed by the recrystallization ofaustenite at temperatures of 900°C or above. Partial reversion resulted in an excellent combinationof yield strength and elongation in 301LN, and also in 301 such ones were attained in the revertedstructure even before any profound formation of submicron grains
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/02/15/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.539-543.4875.pdf
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