Journal
MATERIALS RESEARCH EXPRESS
Volume 7, Issue 11, Pages -Publisher
IOP PUBLISHING LTD
DOI: 10.1088/2053-1591/abc79f
Keywords
asymmetric rolling (ASR); hall– Petch relationship; grain boundary effect; interstitial-free (IF) steel
Categories
Funding
- National Natural Science Foundation of China [51774006]
- NSFC- Iron and Steel Joint Fund of the National Natural Science Foundation of China [U1860105]
Ask authors/readers for more resources
Asymmetric rolling (ASR) is an efficient processing for fabricating ultrafine-grained (UFG) materials. In the present investigation, interstitial-free (IF) steels with the grain size ranged from 500 nm to 500 mu m were obtained by asymmetric rolling and subsequent annealing. The evolution of microstructures and mechanical properties of IF steel were studied. Accordingly, the Hall-Petch relationship of IF steel with a wide grain size range was established. It was found that ultimate tensile strength (UTS) corresponds well to the Hall-Petch relationship over the whole grain size range. However, the yield strength (YS) and hardness deviated from the Hall-Petch relationship as the grain size is larger than 100 mu m, which is mainly attributed to the slight effect of grain boundary as obstacle on the dislocation movement and/or pile-up under small deformation in coarse grain (CG).
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available