Creep Rupture Strength and Electron Microstructures of 2 1/4% Cr-1% Mo Steels after Heat Treatments

Representation of the Heat Specific Creep Rupture Behavior of 9%Cr Steels using Neural Networks

The present work aims to demonstrate an innovative way of application of modern data analysis tools for structural power plant materials, such as 9%Cr-steels. The purpose is the optimized prediction of the material behaviour considering the stress/time to rupture data and the determination of position of the specific melt in the scatter band for the given steel. This data is needed for an effec...

Neural network model of creep strength of austenitic stainless steels

The creep rupture life and rupture strength of austenitic stainless steels have been expressed as functions of chemical composition, test conditions, stabilisation ratio, and solution treatment temperature . The method involved a neural network analysis of a vast and general database assembled from published data. The outputs of the model have been assessed against known metallurgical trends an...

A Review of Creep Deformation and Rupture Mechanisms of Cr-Mo Alloy for the Development of Creep Damage Constitutive Equations under Lower Stress

This paper presents a review of creep deformation and rupture mechanisms of low Cr-Mo alloy for the development of its creep damage constitutive equations under lower stress. The most popular Kachanov-Robatnov-Hayhurst (KRH) formulation was not necessarily developed and calibrated for low stress and cannot depict the creep strain accurately under multi-axial state of stress due to the three-dim...

Effects of Heat Treatments on Steels for Bearing Applications

Effect of Zr Addition on Mechanical Properties of Cr-Mo Plastic Mold Steels

We investigated the effects of the additions of Zr and other alloying elements on the mechanical properties and microstructure in Cr-Mo plastic mold steels. The addition of alloying elements changed the microstructure of the normalized samples from the upper bainite to lower bainite due to the increased hardenability. The tempering temperature influenced the strength and hardness values, especi...