Paper Title:
Non-Isothermal Austenite Grain Growth Kinetics in the HAZ of a Microalloyed X-80 Linepipe Steel
  Abstract

Non-isothermal austenite grain growth kinetics under the influence of several combinations of Nb, Ti and Mo containing complex precipitates has been studied in a microalloyed linepipe steel. The goal of these studies is the development of a grain growth model to predict the austenite grain size in the weld heat affected zone (HAZ). A detailed electron microscopic investigations of the as-received steel proved the presence of Ti-rich, Nb-rich and Mo-rich precipitates. Inter and intragranular precipitates of ~5-150 nm have been observed. The steel has been subjected to austenitizing heat treatments to selected peak temperatures of 950, 1150 and 1350°C at various heating rates of 10, 100 and 1000°C/s. Thermal cycles have been found to have a strong effect on the final austenite grain size. The increase in heating rate from 100 to 1000°C/s has a negligible difference in the austenite grain size irrespective of the austenitizing temperature. However, the increase in grain size has been noticed at 10°C/s heating rate for all the austenitizing temperatures. The austenite grain growth kinetics have been explained taking into account the austenite growth in the presence of precipitates.

  Info
Periodical
Solid State Phenomena (Volumes 172-174)
Edited by
Yves Bréchet, Emmanuel Clouet, Alexis Deschamps, Alphonse Finel and Frédéric Soisson
Pages
809-814
DOI
10.4028/www.scientific.net/SSP.172-174.809
Citation
K. Banerjee, M. Perez, M. Militzer, "Non-Isothermal Austenite Grain Growth Kinetics in the HAZ of a Microalloyed X-80 Linepipe Steel", Solid State Phenomena, Vols. 172-174, pp. 809-814, 2011
Online since
June 2011
Export
Price
$32.00
Share

In order to see related information, you need to Login.

In order to see related information, you need to Login.

Authors: Sadegh Moeinifar
Abstract:The objective of this paper is to study the influence of second peak temperature during simulated welding on properties of the subcritically...
1850
Authors: Xin Jie Di, Dan Xu, Yong Chang Liu
Chapter 3: Materials Forming, Machining and Joining
Abstract:The microstructure and carbide precipitate of simulated coarse grain heat affected zone(CGHAZ) in modified high Cr ferritic heat-resistant...
1320
Authors: Xiang Liu, Fan Zhao, Zheng Qiang Dong, Chao Lei Zhang, Yu Shan Kou, Ya Zheng Liu
Symposium S: Materials for Mechanical Engineering and Processing Technology
Abstract:The effect of 0.018% niobium additions on austenite grain coarsening behavior of GCr15 bearing steel was studied. Results indicate that the...
121
Authors: Ji Dong, Chen Xi Liu, Yong Chang Liu, Chong Li, Qian Ying Guo, Hui Jun Li
Chapter 7: Alloys, Steel, Superhard Materials
Abstract:In order to investigate the effect of austenite grain size on martensite start temperature of Nb-V-Ti micro-alloyed ultra-high strength...
624