In-situ dendrite/metallic glass matrix composites (MGMCs) with a composition of Ti₄₆Zr₂₀V₁₂Cu₅Be₁₇ exhibit ultimate tensile strength of 1510 MPa and fracture strain of about 7.6%. A tensile deformation model is established, based on the five-stage classification: (1) elastic-elastic, (2) elastic-plastic, (3) plastic-plastic (yield platform), (4) plastic-plastic (work hardening), and (5) plastic...

It is quite frequent for a number of solid–state transformations to occur concurrently, starting from the same parent phase. The transformations may occur at different rates, but the resulting competition for space or for the partitioning of driving force between the precipitating phases can be seminal to the development of many microstructures found in commercial alloys. This paper reviews the...

Developments in computer-aided engineering and the rapid growth of computational power have made simulation-driven process and product development efficient and useful since it enables detailed evaluation of product designs and their manufacturing processes. In the context of a sheet metal component, it is vital to predict possible failure both during its forming process and its subsequent usag...

Deep cryogenic treatment of tool steels, incorporated in conventional hardening and tempering, has been a topic intensive research recent years. Yet, the governing microstructural mechanisms involved deep high-alloyed steels are still controversial. Thus, an situ X-ray diffraction study is conducted on three X38CrMoV5-3, X153CrMoV12, ~X190CrVMo20-4 to shed light evolution during subsequent temp...

Twinning induced plasticity steels are austenitic alloys in which mechanical twinning is a prominent deformation mode, and which exhibit exceptional combinations of ductility, work hardening and ultimate strength. The authors develop in the present paper a crystallographic theory to enable the quantitative investigation of the role of mechanical twinning in enhancing the properties of these all...

Grain boundary (GB) segregation of impurity/solute atoms in surveillance test specimens of a commercial western-type pressurized water reactor pressure vessel (RPV) steel has been observed by using state-of-the-art 3D atom probe (3DAP) field ion microscope (laser-assisted local electrode-type atom probe: laser-LEAP). The GB segregation is considered to be an origin of the embrittlement of the R...

Irradiation-induced hardening is an important phenomenon concerning the nuclear reactor safety, because it induces the embrittlement of reactor pressure vessel steels. This phenomenon, however, can also be applied for the modification of hardness of alloys. In the case of FeCu alloys, we have reported that GeV heavy-ion irradiation remarkably increases the hardness [1]. Volkov et al. have expla...

Thermal treatments and thermo-mechanical processing routes were applied on a conventional structural steel (st37 steel: 0.12C-1.11Mn-0.16Si) for improvement of tensile properties and enhancement of work-hardening behavior. Full annealing resulted in a sheet with coarse ferrite grains and pearlite colonies arranged alternatively in distinct bands, which showed high ductility, low strength, and t...