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 present paper reports on the effect of texture on the cyclic stress-strain response(CSSR) and the fatigue life of ultrafine-grained (UFG) interstitial-free (IF) steel. Tests in the lowcyclefatigue (LCF) regime were conducted on material that was processed by the equal channelangular extrusion (ECAE) technique along the so called “efficient” route 8E. This route has beenshown to result in a homogeneous microstructure with a high fraction of high angle grainboundaries (HAGBs), which are beneficial for a stable CSSR. In addition, the evolution of themicrostructure was characterized by means of electron optical techniques, including electronbackscattered diffraction, and by X-Ray diffractometry. It was found that the initial texture ofspecimens cut from the ECAE billet along different orientations with respect to the extrusiondirection (ED) has a substantial effect on the CSSR of the UFG IF steel. Furthermore, microscopyresults indicated the notable influence of the last ECAE processing step on the evolution of damagein the material
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/02/19/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.584-586.864.pdf
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