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Strain-Controlled Thermal-Mechanical Fatigue Behavior and Microstructural Evolution Mechanism of the Novel Cr-Mo-V Hot-Work Die Steel.
Materials (Basel)
January 2025
School of Materials Science and Engineering, Henan University of Science and Technology, Luoyang 471023, China.
In response to the intensifying competition in the mold market and the increasingly stringent specifications of die forgings, the existing 55NiCrMoV7 (MES 1 steel) material can no longer meet the elevated demands of customers. Consequently, this study systematically optimizes the alloy composition of MES 1 steel by precisely adjusting the molybdenum (Mo) and vanadium (V) contents. The primary objective is to significantly enhance the microstructure and thermal-mechanical fatigue performance of the steel, thereby developing a high-performance, long-life hot working die steel designated as MES 2 steel.
View Article and Find Full Text PDFTendon-mimicking anisotropic alginate-based double-network composite hydrogels with enhanced mechanical properties and high impact absorption.
Carbohydr Polym
March 2025
School of Chemical Engineering, Sungkyunkwan University (SKKU), Suwon 16419, Republic of Korea; Department of Health Sciences and Technology, Samsung Advanced Institute for Health Sciences & Technology (SAIHST), Sungkyunkwan University (SKKU), Suwon 16419, Republic of Korea; Department of MetaBioHealth, Sungkyunkwan University (SKKU), Suwon 16419, Republic of Korea; Biomedical Institute for Convergence at SKKU (BICS), Sungkyunkwan University (SKKU), Suwon 16419, Republic of Korea; Institute of Quantum Biophysics (IQB), Sungkyunkwan University (SKKU), Suwon 16419, Republic of Korea. Electronic address:
Tendons are anisotropic tissues with exceptional mechanical properties, which result from their unique anisotropic structure and mechanical behavior under stress. While research has focused on replicating anisotropic structures and mechanical properties of tendons, fewer studies have examined their specific mechanical behaviors. Here, we present a simple method for creating calcium-crosslinked alginate-based double-network hydrogels that mimics tendons by exhibiting anisotropic structure, high mechanical strength and toughness, and a distinctive "toe region" when stretched.
View Article and Find Full Text PDFControlling Microparticle Aspect Ratio via Photolithography for Injectable Granular Hydrogel Formation and Cell Delivery.
ACS Biomater Sci Eng
January 2025
Weldon School of Biomedical Engineering, Purdue University, West Lafayette 47907-2050, Indiana, United States.
Granular hydrogels are injectable and inherently porous biomaterials assembled through the packing of microparticles. These particles typically have a symmetric and spherical shape. However, recent studies have shown that asymmetric particles with high aspect ratios, such as fibers and rods, can significantly improve the mechanics, structure, and cell-guidance ability of granular hydrogels.
View Article and Find Full Text PDFEffect of Ni/Sn ratio on microstructure and properties of Cu-Ni-Sn-P alloy.
Sci Rep
December 2024
Institute of Applied Physics, Jiangxi Academy of Sciences, Nanchang, 330096, China.
Cu-1.33Ni-1.35Sn-0.
View Article and Find Full Text PDFMorphological modulation of starch chains from nanorod to nanospindle via temperature-controlling rearrangement.
Int J Biol Macromol
February 2025
College of Biosystems Engineering and Food Science, National-Local Joint Engineering Laboratory of Intelligent Food Technology and Equipment, Zhejiang Key Laboratory for Agro-Food Processing, Integrated Research Base of Southern Fruit and Vegetable Preservation Technology, Fuli Institute of Food Science, Zhejiang University, Hangzhou, 310058, China; Innovation Center of Yangtze River Delta, Zhejiang University, Jiaxing 314102, China. Electronic address:
Polymorphic nanoparticles, including starch nanoparticles (SNPs), have increasingly attracted attention, particularly rod-shaped variants, which are used for constructing anisotropic systems. Compared to symmetrically spherical particles, they show superior properties such as gastrointestinal retention for functional nutrients/drugs delivery and mechanical enhancement of filled materials, but their controlled fabrication remains a challenge. In this study, we yielded polymorphic SNPs with nearly axisymmetric geometries through a combined alkaline hydrolysis and nanoprecipitation method, followed by temperature-controlling rearrangement.
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