Samples of a Fe–34.5Mn–0.04C (wt. %) austenitic steel with average grain size ranging from 0.45 to 21.0 μm were produced by cold rolling and subsequent annealing. The effects of microstructure on room–temperature (RT) and cryogenic tensile properties and on the related fracture modes were...

For partially worked metals such as punching-processed steel plates, a process-affected zone designated “shear-affected zone” (SAZ) is formed. In this study, tensile tests of punched specimens were conducted to determine the strength of partially worked metals. In the fracture surface of the...

In the present research, the multi-pulse resistance spot welding involving three thermal cycles has been carried out on the Q&P980 steel sheet with the thickness of 1.8mm. The influence of welding pulses on the microstructure evolution and mechanical properties of the welded specimens was...

Inhibiting the diffusion and aggregation of hydrogen atoms can effectively improve the hydrogen-induced delayed fracture resistance of high strength hot-stamped steel. Here we investigate the interaction between dislocations, precipitates and hydrogen atoms in a 2000 MPa grade hot-stamped steel...

Transient liquid phase (TLP) bonding could be used for repairing large cracks or worn areas on aerospace components. TLP bonding of IN718 Ni-based alloy and 316LN steel was carried out using BNi-2 Ni-based foil at 1050℃ for different holding time. The formation and evolution of the athermal...

The main aim of current study is to evaluate the anti-penetration deformation behavior of an ultra-high strength low alloy armor steel (commercial name: XF1700) at strain rates 0.001/s, 0.1/s (quasi-static), 922/s, 5962/s, 6000/s (dynamic) and temperatures 298K, 373K(0.2Tm), 473K(0.26Tm) and...

The dependence of processing route on the microstructure and tensile behavior was analyzed in a V microalloyed Mn-medium steel containing (in mass%) 3.5 Al and 1.2 Si. To obtain four different microstructures, as hot rolled (HR) band was divided in several parts and three of them were submitted...

Accepted theories explaining a principle cause for sharp yield points and the ductile-brittle transition in hypoeutectic plain carbon steels can be supplemented by the existence of hard grain boundary walls. Atomic Force Microscopy revealed that grain boundaries between adjoining grains in these...

In this paper, the influences of prior cold deformation and tempering time on the precipitation behaviors, substructure evolution, and mechanical properties of a novel G115 martensitic heat resistant steel were systematically investigated. It was found that the deformation reduction and...

During quenching of steel, the rate of heat removal from the surface and the local cooling rate of steel determine its microstructure. Here these rates are controlled by the extent of the force flow (e.g., single and multiple jets, forced and unforced immersion), coolant (e.g., water and oil),...