Abstract
Abstract The deformation behavior of 49MnVS3 non-quenched and tempered steel was studied using isothermal compression tests at the temperature range of 750–1000 °C and the strain rate range of 0.1–50 s−1 on a Gleeble-3500 thermal mechanical simulator. The results indicated that the flow stress increases significantly with decreasing temperature and increasing strain rate. Under the whole deformation conditions, the dependence of flow stress on deformation temperature and strain rate was analyzed by hyperbolic sine equation. Besides, the hot deformation activation energy and stress exponent were calculated to be 323.56 kJ/mol and 6.99, respectively. In addition, the processing map based on dynamic material model was established, and the optimum processing condition of the 49MnVS3 non-quenched and tempered steel can be determined to be at the temperature range of 809–850 °C and strain rate of 36.6 s−1–50 s−1.
Highlights
As an energy-efficient steel, non-quenched and tempered steel combines forging and heat treatment into one process, which is not required for quenching and heat treatment [1]
The results indicated that the flow stress increases significantly with decreasing temperature and increasing strain rate
The flow stress increases monotonously with the increase of strain under certain deformation conditions, and the rate of increase of flow stress decreases with the increase of strain, showing that the experimental steel softens to the main dynamic response
Summary
As an energy-efficient steel, non-quenched and tempered steel combines forging and heat treatment into one process, which is not required for quenching and heat treatment [1]. The constitutive equation is the basic data that can predict the flow behaviors of material [10]. The processing maps based on the dynamic materials model (DMM) have already been successfully used to study the deformation behavior of various metals and their alloys, such as aluminum alloy, copper alloy, magnesium alloy, titanium alloy, stainless steel and nickel base alloy [11,12,13,14,15,16]. The safe and hazardous areas of the plastic working of the material can be obtained by processing map, thereby obtaining the optimized thermal parameters of the material. The proposed study aimed to study the high temperature deformation behavior of 49MnVS3 non-quenched and tempered steel.
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
