Development of High-Strength Cu-Ni-Ti-B Multiphase Steel by Direct Air Cooling

Abstract

The present study concerns development of high-strength low-carbon Cu-Ni-Ti-B multiphase steels in the as-hot-rolled condition. An attempt has been made to predict the microstructural evolution of the chosen steels during continuous cooling transformation by artificial neural network modeling as well as dilatometric study. Experimental results have demonstrated that direct air cooling of the hot-rolled Cu-Ni-Ti-B steel resulted in a microstructure containing intercritical ferrite and finer low-temperature transformation products of austenite. An attractive strength-ductility combination was achieved in the case of as-hot-rolled Cu-Ni-Ti-B steel with a dual-phase-like microstructure. Age hardening of the steels has further enhanced the mechanical properties. Analysis of the work-hardening behavior by differential Jaoult-Crussard (J-C) analysis has revealed the effect of aging on the work-hardening behavior.

Soft computing techniques in advancement of structural metals

“…Correlation of the composition, process and properties of HSLA steel was studied by using ANN and ANFIS models. [254][255][256] In the simpler model, ANN and ANFIS were employed for prediction of the hardness and tensile properties from the input dataset, comprising composition and hot rolling parameters. Subsequently, prestrain and aging parameters were included in the dataset to predict their effects on the tensile properties.…”

Effect of Cold Work, Ageing on Hardness and Ultimate Tensile Strength of Microalloyed Steel

“…In the presence of undissolved particles like TiN or Nb (C, N) grain growth of austenite during soaking may be restricted by more additions elements related to alloy [17]. Systematic efforts have been made to study the role of microalloying elements in steels [18][19][20][21][22][23][24][25][26][27][28][29][30]. Pickering et al pointed out that in austenite, there is a formation of precipitates that takes place.…”