Fully ferritic stainless steels, strengthened by Laves phase precipitates, were developed for high-temperature application in the next generation of ultra-super-critical thermal power plants. Based on the rapid occurrence of thermomechanically induced precipitation in strengthening Laves phase particles, a novel thermomechanical process route for this class of steels was developed. A controlled precipitation of particles, in a desired morphology and quantity, and an optimization of the corresponding forging parameters was achieved on a laboratory scale. This article outlines the very first up-scaling experiment with these optimized forging parameters from the laboratory scale to the industrial scale. The precipitation behavior was analyzed, utilizing digital particle analysis of scanning electron microscopy (SEM) images, to estimate and compare the phase fraction of the precipitated Laves phase, as well as the particle size and distribution. Due to the up-scaling in the forging process, the behavior of the precipitation changed and the precipitation strengthening effect was decreased, in comparison with the laboratory scale.
Download full-text PDF |
Source |
|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC8037446 | PMC |
| http://dx.doi.org/10.3390/ma14071635 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Creep Resistance and Microstructure Evolution in P23/P91 Welds.
Materials (Basel)
January 2025
Faculty of Materials Science and Technology, VŠB-Technical University of Ostrava, 17. listopadu 2172/15, 708 00 Ostrava, Czech Republic.
This paper summarizes the results of investigations into heterogeneous P23/P91 welds after long-term creep exposure at temperatures of 500, 550 and 600 °C. Two variants of welds were studied: In Weld A, the filler material corresponded to P91 steel, while in Weld B, the chemical composition of the consumable material matched P23 steel. The creep rupture strength values of Weld A exceeded those of Weld B at all testing temperatures.
View Article and Find Full Text PDFEvaluation of the Microstructure and Properties of As-Cast Magnesium Alloys with 9% Al and 9% Zn Additions.
Materials (Basel)
December 2024
Faculty of Mechanical Engineering, Czech Technical University in Prague, 16629 Prague, Czech Republic.
The need to reduce energy consumption means that it is necessary to reduce the weight of vehicles. However, a thick wall of massive elements promotes the formation of casting defects, which must be removed by either plastic processing (straightening) or welding methods (surface and internal discontinuities). Basic alloys contain Al and Zn as the main alloying elements.
View Article and Find Full Text PDFThe Effect of TiC-TiB Dual-Phase Nanoparticles on the Microstructure and Mechanical Properties of Cast Ni-Fe-Based Superalloys.
Materials (Basel)
November 2024
Key Laboratory of Automobile Materials, Ministry of Education and School of Materials Science and Engineering, Jilin University, No. 5988 Renmin Street, Changchun 130022, China.
TiC-TiB dual-phase nanoparticles were added into a Ni-Fe-based cast superalloy and their effects on the microstructure and mechanical properties were compared to those of a Ni-Fe-based superalloy with the addition of TiC nanoparticles. The addition of TiC nanoparticles led to the precipitation of a higher volume fraction of carbides. Compared to the addition of TiC, the addition of TiC-TiB nanoparticles not only led to the precipitation of carbides but also promoted the formation of flaky borides and a reduction in the precipitation of the Laves phase.
View Article and Find Full Text PDFSystematic Investigations of the Solid Solution Zr(V1-xAlx)2 Adopting the Laves Phase Structures.
Chemistry
December 2024
Universität des Saarlandes: Universitat des Saarlandes, Institut für Anorganische und Analytische Chemie, 48149, Saarbrücken, GERMANY.
Laves phases are an interesting field of research when it comes to structural chemistry and physical properties. Investigations of the ternary system Zr-V-Al showed, in contrast to the system Hf-V-Al, that no superstructures can be observed within the solid solution Zr(V1-xAlx)2. High values of x form aluminum rich phases that adopt the hexagonal MgZn2 type structure while low values of x lead to vanadium rich phases that adopt the cubic MgCu2 type.
View Article and Find Full Text PDFEffect of ultrasonic vibrations on mass efficiency and microstructure of laser direct deposition Inconel 718 superalloy.
Ultrason Sonochem
December 2024
Faculty of Materials and Manufacturing Technologies, Malek Ashtar University of Technology, Iran.
Laser direct deposition (LDD) is widely used to repair and manufacture high-value industrial components. However, it faces various defects, such as porosity, cracks, non-uniform microstructure, lack of fusion, keyhole phenomenon, element segregation, and undesirable secondary phases. A method to manage these defects is to concurrently apply ultrasonic vibrations (USV) during the LDD process.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!