Precipitation hardening is one of the most frequently used methods post-processing heat treatments 3D printed tool steel 1.2709, as it increases yield and ultimate tensile strengths steel. Within this work, broad temperature range 250°C – 550°C was tested with five differ-ent holds at each to study effect processing parameters on microstructure mechanical properties. Maraging 1.2709 pro...

Metallic nanowires usually exhibit ultrahigh strength but low tensile ductility owing to their limited strain hardening capability. Here we study the unique strain hardening behavior of the five-fold twinned Ag nanowires by nanomechanical testing and atomistic modeling. In situ tensile tests within a scanning electron microscope revealed strong strain hardening behavior of the five-fold twinned...

dynamic recrystallization, drx, behaviour of a precipitation hardened, ph, stainless steel was studied in connection with microstructural developments in a compression test. the experimental results showed that the dominant mechanism of softening is drx, but at high strain rates and low temperatures, ie, high zener-holman parameter, z, work hardening and dynamic recovery, drv, produced a pancke...

Al–Zn–Mg–Cu alloys obtain their exceptional high strength predominately relying on precipitation. Deformation can influence the evolution of precipitation and may potentially provide additional through work hardening. In this study, coupling dislocation strengthening to achieve unique property combinations with strengths greater than those due heat treatment alone was investigated pre-aged AA70...

1967 Price 8s 6d net .-summary The time hardening, life fraction and strain hardening hypotheses variously proposed to describe tiniaxisl creep deformation are considered and compared with experimental evidence. It is concluded that the strain hardening hypothesis is the most nearly correct, the experimental strains usually being within 50% of those predicted. Further, rheological and modified ...

This work demonstrates that Cd microadditions can enhance the precipitation of age-hardening precipitates in 2xxx and 6xxx alloys as well dispersoid 3xxx alloys, but have a minimal effect on 7xxx alloys. Experimental theoretical methods are utilised to investigate nucleation precipitates/dispersoids Cd-containing Al The enhanced θ′ α-dispersoids respectively, proposed result from heterogeneous ...

The precipitation of A type partially coherent precipitates occurring in the first step of the structural hardening of the 15-5 PH martensitic stainless alloy was studied by anomalous small angle X ray scattering at four absorption edges (KCr, KFe, KNi and KCu). An important anomalous effect was clearly observed at the KFe and KCu absorption edges. The precipitation occurs according to the two-...

The decomposition of martensite during tempering or ageing is an important phenomenon as it leads to changes in the mechanical properties. These changes could take place during both steel manufacturing or in-service. Thus, their understanding is required to predict the material performance. Recent advances in the development of local electrode atom probes has led to a significant increase in th...

A detailed quantitative model for the strengthening of monolithic alloys and composites due to precipitation strengthening, solution strengthening, grain and subgrain strengthening, strengthening by dislocations and load transfer to ceramic inclusions is presented. The model includes a newly derived description of the effect of a precipitate free zone (PFZ) around the reinforcing phase incorpor...