In this study, isothermal single-pass forming doformation of forged 18CrNiMo7-6 alloy steel was carried out by Gleeble-3500 thermal simulation testing machine. The constitutive equations and processing maps with parameters deformation temperature strain rate were established. results show that the optimum hot are 1050 °C, 0.1 s–1 peak power efficiency being 0.432. mechanism grain refinement dur...

Abstract The role of titanium and vanadium carbonitrides (Ti,V)(C,N) the MX series on austenite-to-ferrite transformation in microalloyed steels their potential acting as pre-nuclei for intragranular ferrite nucleation is examined experimentally by computational simulation. Thermal treatments single-hit compression tests are performed a dilatometer Gleeble® 3800 thermomechanical simulator to in...

This paper presents an experimental characterisation of fatigue at welded connections for the next-generation high-strength low-alloy offshore riser steel, X100Q. An instrumented girth weld is conducted with a parallel programme physical-thermal simulation (Gleeble) to develop heat affected zone (HAZ) test specimens. X100Q shown exhibit superior performance current state art X80. Significant di...

A combined experimental numerical approach is applied to determine the transformation induced plasticity (TRIP)-parameter K for different strength low-alloy steels of grade S355J2+N and S960QL as well as the super martensitic filler CN13-4-IG containing 13 wt% chromium and 4 wt% nickel. The thermo-physical analyses were conducted using a Gleeble (®) 3500 facility. The thermal histories of the s...

The success of a FE model for metal cutting process is strongly dependent on the accurate characterization of the workpiece material, under similar conditions as those found in metal cutting. In this paper, dynamic shear tests using a Gleeble machine have been performed on 4 mm thickness disks of AZ31B-O magnesium alloy, using a special designed tool. In order to include the effects of the cryo...

The ability of laser-ultrasound to monitor in real-time metallurgical transformations is reviewed in this paper. Although the technique is appropriate for online industrial materials characterization, this paper addresses laboratory characterization of metallurgical transformations. Examples are presented on the real-time sensing of grain size and grain growth, phase transformation and recrysta...

In the present investigation, non-recrystallization temperature (TNR) of niobium-microalloyed steel is determined to plan rolling schedules for obtaining desired properties steel. The value TNR based on both alloying elements and deformation parameters. literature, equations have been developed utilized. However, each equation has certain limitations which constrain its applicability. This stud...

A suite of experimental tools and fast-acting, numerical-simulation techniques was used to quantify the precipitation behavior three nickel-base superalloys: IN-100, LSHR, 718. Experimental methods comprised differential scanning calorimetry (DSC) establish specific heat as a function temperature selected direct-resistance heating trials (using Gleeble® machine) obtain samples for microstructur...

A Gleeble thermo-mechanical simulator was used to simulate the welds of duplex stainless steel S32101. micro-precipitate chromium-nitride and its surroundings in simulated analyzed detail by SEM/AES EC-AFM. The AES analysis revealed that a chromium-depleted area is present γ phase near chromium-nitrides precipitated at α/γ grain boundary. EC-AFM observation preferentially dissolves from area.