Strength and toughness tradeoffs for an ultrafine-grain size ferrite/cementite steel produced by warm-rolling and annealing

Zhao, Ming-Chun, Huang, Xiao-Fang, Li, Jing-Li, Zeng, Tian-Yi, Zhao, Ying-Chao and Atrens, Andrej (2011) Strength and toughness tradeoffs for an ultrafine-grain size ferrite/cementite steel produced by warm-rolling and annealing. Materials Science and Engineering A: Structural Materials Properties Microstructure and Processing, 528 28: 8157-8168. doi:10.1016/j.msea.2011.07.067


Author Zhao, Ming-Chun
Huang, Xiao-Fang
Li, Jing-Li
Zeng, Tian-Yi
Zhao, Ying-Chao
Atrens, Andrej
Title Strength and toughness tradeoffs for an ultrafine-grain size ferrite/cementite steel produced by warm-rolling and annealing
Journal name Materials Science and Engineering A: Structural Materials Properties Microstructure and Processing   Check publisher's open access policy
ISSN 0921-5093
1873-4936
Publication date 2011-10-25
Sub-type Article (original research)
DOI 10.1016/j.msea.2011.07.067
Volume 528
Issue 28
Start page 8157
End page 8168
Total pages 12
Place of publication Lausanne, Switzerland
Publisher Elsevier
Collection year 2012
Language eng
Formatted abstract
For an ultrafine grain ferrite/cementite (UGF/C) steel, the Charpy impact energy was measured at temperatures from 373. K to 4.2. K, and tensile tests were carried out at temperatures between 323. K and 77. K. For the steel with annealed microstructure, the ductile-to-brittle transition appearance temperature (DBTT) was lower than the Charpy transition temperature (CTT). With increasing annealing time at 873. K, the DBTT and the CTT increased, and the DBTT approached the CTT. The DBTT decreased with decreasing effective grain size. The effective grain size correlated to the grain size of the larger grain size peak in the distribution of grains with {1. 0. 0} planes. The annealed microstructures had higher yield strength for equivalent toughness (including upper shelf energy, DBTT and CTT) compared to the conventional ferrite/pearlite steel.
Keyword Ultrafine-grained ferrite/cementite microstructure
Impact energy
Toughness
Ductile fracture
Cleavage fracture
Ductile-to-brittle transition
Low-carbon steel
Ductile-brittle transition
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Mechanical & Mining Engineering Publications
Official 2012 Collection
 
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