Paper Title:
Atomic Scale Investigation of Solutes and Precipitates in High Strength Steels

Two steels, ferritic, high strength with interphase precipitation and nanobainitic, were used to show the advances in and application of atom probe. The coexistence of the nanoscale, interphase Nb-Mo-C clusters and stoichiometric MC nanoparticles was found in the high strength steel after thermomechanical processing. Moreover, the segregation of carbon at different heterogeneous sites such as grain boundary that reduces the solute element available for fine precipitation was observed. The APT study of the solutes redistribution between the retained austenite and bainitic ferrite in the nanobainitic steel revealed: (i) the presence of two types of the retained austenite with higher and lower carbon content and (ii) segregation of carbon at the local defects such as dislocations in the bainitic ferrite during the isothermal hold.

Edited by
L. Pentti Karjalainen, David A. Porter and Seppo A. Järvenpää
P. Hodgson, S. Mukherjee, H. Beladi, X. Y. Xiong, I. B. Timokhina, "Atomic Scale Investigation of Solutes and Precipitates in High Strength Steels", Materials Science Forum, Vol. 762, pp. 14-21, 2013
Online since
July 2013
Authors: Francisca García Caballero, J. Chao, J. Cornide, Carlos García-Mateo, Maria Jesus Santofimia, Carlos Capdevila
Abstract:Carbide free bainite has achieved the highest strength and toughness combinations to date for bainitic steels in as-rolled conditions. By...
Authors: Maria Jesus Santofimia, Lie Zhao, Yoshiki Takahama, Jilt Sietsma
Abstract:The quenching and partitioning (Q&P) process is a novel heat treatment for the development of advanced high strength steels that is raising...
Authors: Sourav Das, Saurabh Kundu, Arunansu Haldar
Chapter 6: Materials
Abstract:Bainitic steels, which are transformed at very low temperatures, offer an excellent combination of strength and ductility where the strength...
Authors: Li Hui Wang, Di Tang, Hai Tao Jiang, Ji Bin Liu, Yu Chen
Chapter 3: Steel and Iron Technology
Abstract:Effects of continuous annealing process on microstructure and properties of Si based cold-rolled TRIP Steel were studied. The results show...
Authors: Zhuang Li, Di Wu, Wei Lv, Shao Pu Kang, Zhen Zheng
Chapter 1: Materials Engineering. Technologies and Processing
Abstract:In this paper, ultra-high strength dual phase steel was investigated. Thermomechanical processing was conducted by using a laboratory hot...