Hot forming is an essential part of the manufacturing most steel products. The hot deformation behaviour determined by temperature, strain rate, and chemical composition steel. To date, constitutive models are constructed for many steels; however, their specific limits application. In this paper, a novel artificial neural network (ANN) model was built to determine flow stress with high accuracy...

2219 aluminum alloy is a kind of high-strength Al-Cu-Mn that can be strengthened by heat treatment. Its mechanical property parameters and forming properties are greatly affected the deformation rate, temperature strain. Taking extruded bar as research object, Gleeble-3500 thermomechanical simulator was used to analyze thermal compression behavior under different temperatures strain rates. The ...

In order to systematically study the stress correction method and hot deformation behavior of F92 stainless steel, compression test was performed using a Gleeble-3500 (DSI USA, Connecticut, CT, USA) at strain rates 0.01–10 s−1 temperatures 750–1150 °C. First, obtain truest values from original data, we adopted two models that did not affect each other, also different. Second, adiabatic-friction...

Abstract Mechanical strengthening of sheet material can be realized by accumulative roll bonding, which belongs to the severe plastic deformation processes. Beside fine-grain hardening also work and precipitation is responsible for rise strength. However, this accompanied a significant decrease in ductility. Thus, need an enhancement ductility essential sufficient formability later applications...

Major improvements in new advanced high strength steels, especially related to microstructural features, have been made by the steel sector access trade-off between and ductility. In this context, present study provides a detailed analysis of microstructure cold rolled with minimum tensile 980 MPa, which possesses superior elongation when compared other conceptions steels from same level. The a...

the acceptance of the right project which leads to the realization of the set objectives is one of the most important issues in project-oriented companies. therefore, corporate managers prefer to work on those projects which ensures the achievement of goals such as increasing financial profits or being the top brands in their rivals market. the present  research aimed at introducing  a systemat...

the acceptance of the right project which leads to the realization of the set objectives is one of the most important issues in project-oriented companies. therefore, corporate managers prefer to work on those projects which ensures the achievement of goals such as increasing financial profits or being the top brands in their rivals market. the present  research aimed at introducing  a systemat...

the determination of gyration radius is a strong research for configuration of a macromolecule. italso reflects molecular compactness shape. in this work, to characterize the behavior of theprotein, we observe quantities such as the radius of gyration and the average energy. we studiedthe changes of these factors as a function of temperature for acetylcholine receptor protein in gasphase with n...

Hot compression tests were conducted using a Gleeble 3500 thermomechanical simulator at temperatures ranging from 1,000 to 1,200°C with the strain rate 0.1 10 s −1 . Electron backscatter diffraction (EBSD) technique was employed by investigating microstructure evolution during hot deformation. Microstructure observations reveal that deformation and rates have significant effect on DRX process. ...

The hot deformation behavior of Cu-20.0Ni-5.0Sn-0.25Zn-0.22Mn was investigated using a Gleeble-3500 thermal simulator with temperature range from 720 °C to 880 and strain rate 0.001 s?1 1 s?1. results show that the flow stress increased increase decrease temperature. constitutive equation alloy established based on peak stress. Figures power dissipation efficiency instability variable true 0.2 ...