Grain Boundary Segregation In Steels: Towards Engineering The Design Of Internal Interfaces

TL;DR: The intermediate-temperature embrittlement of metals and alloys exhibits diverse causes and failure modes. It involves grain boundary sliding, segregation to the boundaries, and intergranular failure.

TL;DR: In this article , the authors provide an overview of the present state of research in the area of laser AM AZ-based eutectic ceramics and highlight the challenges and future outlooks in this avenue of research.

Abstract: In materials research involving additive manufacturing (AM)-based techniques for fabrication of a wide variety of materials, the latest trend at present is to focus largely on 3D printing (3DP) of nanoceramics, which at present is highly challenging, from both fundamental and industrial viewpoints inspite of the tremendous versatility offered by these techniques in terms of addressing design complexities. The two main reasons for the same are: low density and poor mechanical properties of nanoceramic parts fabricated using 3DP techniques. The fundamental reason behind the two aforementioned features of 3DP-fabricated nanoceramic parts is the huge extent of microstructural inhomogeneity arising primarily due to variation in cooling rates during point by point, line by line or layer by layer deposition methodology followed in 3DP techniques, leading to a number of defects in the microstructure. Moreover, the industrial application of nanoceramic parts manufactured using 3DP techniques, is rather limited, primarily owing to the high manufacturing cost associated with these nanoceramic parts. Although, in the last ten years, there has been a considerable volume of work on 3DP-based techniques for manufacturing ceramic parts with enhanced densities and improved mechanical properties, however, there is limited understanding on the correlation of microstructure of 3DP-fabricated nanoceramic components with the mechanical properties. The present review is aimed to review some of the most commonly used 3DP techniques for the fabrication of nanoceramics and provide an overview of the future perspectives, associated with the necessity towards developing a systematic structure-property correlation through correlative characterisation methodology in these materials.

TL;DR: In this article , a review of previous studies on grain boundaries and nanoprecipitate effects on hydrogen transport in metals, as well as the role of hydrogen in the corrosion and cracking of steels is presented.

TL;DR: In this article, the existence of the so-called "enthalpy -entropy compensation effect" as an inherent property of a system is proven on the basis of a pure thermodynamic analysis.

TL;DR: In this paper, the equilibrium segregation of impurities deteriorates the resistance of the grain boundaries of many structural alloys to various types of intergranular failures, e.g., low-temperature fracture, creep rupture, stress corrosion cracking, fatigue cracks propagation.

TL;DR: In this paper, the influence of trace amounts of phosphorus on the macro-scale delamination in a ferritic steel has been revealed, and two different steels with trace amount of phosphorus were examined to reveal the cause.

TL;DR: In this paper, the authors present interfaces in materials atomic structure thermodynamics and kinetics of solid vapor solid liquid and solid solid interfaces, which they call infectious downloads, where people have look hundreds of times for their favorite novels like this interfaces, but end up in infectious downloads instead of reading a good book with a cup of tea in the afternoon.