Journal
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
Volume 534, Issue -, Pages 514-520Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.msea.2011.11.101
Keywords
Low carbon (LC) steel; Low carbon microalloyed (LC-MA) steel
Ask authors/readers for more resources
Two low carbon steel grades were used in the present investigation. One of them was microalloyed with Ti, V, and Nb. Both steel grades were subjected to a controlled hot forging followed by either cooling in air or quenching water. The microstructures of all TMT conditions are dominated by ferrite phase with different morphologies and grain sizes according to both chemical composition and cooling rate. Polygonal ferrite is considered to be a dominated phase of air cooled microstructures for both steel grades that is responsible for decreasing the hardness, yield, and tensile strength with the attendant increase in ductility. Water quenching leads to a formation of relatively fine polygonal ferrite in low carbon steel or transformation into acicular ferrite in low carbon microalloyed steel. Relatively fine polygonal ferrite and acicular ferrite increase strength but decrease ductility. The cooling rate has a negligible effect on the impact toughness at room temperature. (C) 2011 Elsevier B.V. All rights reserved.
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