Materials Research and Development is an international, peer-reviewed open access journal dedicated to advancing research the field of materials science and engineering. The journal provides a rapid publication process to ensure wide dissemination of high-quality articles to scientists, professionals, and interested individuals worldwide. Our goal is to serve as an efficient, reliable, and trusted platform for scholars and readers, publishing cutting-edge research in the field.
Abstract: In low-temperature conditions, the ductile-to-brittle transition behavior of metal materials is crucial for the safety of engineering structures. This transition leads to the rapid expansion of cracks and could potentially result in accidents. Through retrieval and analysis of the Web of Science database, it was found that research on ductile brittle transition has shown a significant growth trend since 1990, with increasing international collaboration, primarily led by countries such as China, the United States, and Japan. Keyword analysis indicates a primary focus on aspects such as the mechanical properties of materials, the impact of composition on ductility and brittleness, microstructure, and temperature. This paper focuses on FATT50 (Fracture Appearance Transition Temperature at 50% Fracture Probability), comprehensively reviewing domestic and international standards for FATT50. It deeply analyzes the interrelationships between FATT50 and key factors such as material chemical composition, microstructure, and heat treatment. The study reveals that FATT50 is influenced by these factors collectively, especially in terms of chemical composition, microalloying elements, and impurities, which can significantly improve the low-temperature brittleness of metals and subsequently affecting the FATT50 temperature. Changes in microstructure may lead to increased brittleness of metals at low temperatures. Furthermore, the choice of heat treatment process also has a significant impact on FATT50, and adjustments in temperature and time can effectively improve or exacerbate the performance of metals at low temperatures. This research provides valuable insights for understanding and optimizing the performance of metal materials under low-temperature conditions, offering important guidance for engineering practices and materials design.Abstract: In low-temperature conditions, the ductile-to-brittle transition behavior of metal materials is crucial for the safety of engineering structures. This transition leads to the rapid expansion of cracks and could potentially result in accidents. Through retrieval and analysis of the Web of Science database, it was found that research on ductile britt...Learn More
Abstract: As a crucial method of energy storage, dielectric capacitors have garnered significant attention due to their exceptional power density and rapid charging and discharging speed. They play a vital role in high-power energy storage and pulse power systems such as new energy vehicles, industrial lasers, and advanced electromagnetic weapons. However, the most critical technical challenge for dielectric capacitors lies in their lower energy storage density, which limits the application of miniaturization and integrated devices. Therefore, enhancing the energy storage density is imperative for the advancement of dielectric capacitors. In recent years, configuration entropy has emerged as an excellent strategy for regulating the energy storage performance of dielectric materials. Serving as a quantitative indicator to evaluate the non-uniformity of local components, entropy provides the necessary structural foundation to achieve desirable dielectric relaxation properties. Moreover, employing high entropy strategies can generate lattice distortion and high entropy effects that significantly enhance factors like breakdown field strength and polarization intensity while demonstrating remarkable adjustability and practicality. This article reviews both domestic and foreign scholars' research achievements in utilizing high entropy strategies for dielectric energy storage capacitors while providing a detailed introduction to comprehensive improvements in tungsten bronze, pyrochlore, and perovskite-type structural systems based on high entropy oxide structures regarding their overall energy storage performance enhancement. The research progress achieved under the synergistic effect of high entropy strategies is comprehensively summarized from design concepts to materials aspects. Finally, this paper discusses open problems faced by high entropy strategies in optimizing the energy storage performance of dielectric capacitors along with potential development directions.Abstract: As a crucial method of energy storage, dielectric capacitors have garnered significant attention due to their exceptional power density and rapid charging and discharging speed. They play a vital role in high-power energy storage and pulse power systems such as new energy vehicles, industrial lasers, and advanced electromagnetic weapons. However, t...Learn More
