Results 91 to 100 of about 3,044 (204)

Microstructural Refinement in a Low Alloy High Strength Martensitic Steel

Metallography, Microstructure, and Analysis
Abstract The prior austenite grain (PAG) size of a low alloy high strength martensitic steel, AF9628, was refined by rapid austenitizing heat treatments at 825 and 850 °C. The reduction in PAG size of as high as 97% was obtained. After one rapid austenitizing cycle, the newly nucleated (small) PAGs were observed to be preferentially located ...
V. Sinha, M. Gonzales, E. J. Payton
openaire   +1 more source

Rapid heat treatment yields excellent strength and ductility balance in a wear-resistant steel

Journal of Materials Research and Technology
The rapid heating treatment with different tempering temperatures of 160, 200 and 320 °C was innovatively applied in one developed martensitic wear-resistant steel.
En Tang, Qing Yuan, Rui Zhang, Jie Ren, Zhongbo Li, Guang Xu   +5 more
doaj   +1 more source

Tailoring Microstructure and Hardness in Maraging 300 Steel via 2.4 wt.% Niobium Addition and Controlled Aging Treatments

steel research international, EarlyView.
High Nb (2.4 wt.%) addition to Maraging 300 steel drives lattice distortion and nanoscale Nb–Mo‐rich precipitation, confirmed by energy‐dispersive X‐ray spectroscopy mapping (Mo ~5.4 wt.%, Nb ~2.5 wt.%). Nanoindentation reveals strong matrix hardening (H >4.8 GPa) at 480°C aging, while 560°C induces ~1.92 vol.% reverted austenite, enabling tunable ...
Laylla Sharon B. Peixoto, Mohammad Masoumi, Luís Henrique N. de Lima, Marcos Natan da Silva Lima, Luis Flávio Gaspar Herculano, Isabel Ferreira de Barros, Geronimo Perez, Maria Vittoria Moraschini Reis, Hamilton Ferreira Gome Abreu, Marcelo J. Gomes da Silva   +9 more
wiley   +1 more source

Crash Behavior of DP800–DP1000 Advanced High‐Strength Steel’s Dissimilar Resistance Spot Welded Joints Under Quasi‐static and High Strain Rates

steel research international, EarlyView.
The high‐strain‐rate behavior of resistance spot‐welded DP800–DP1000 joints is investigated. Results show that microstructural gradients across BM–HAZ–FZ govern hardness, strain rate sensitivity, and failure modes. While strength increases with strain rate, energy absorption is controlled by ductility, with DP800–DP800 joints showing superior ...
Pankaj Shrivastava, Velaphi Msomi
wiley   +1 more source

Tailored Hardening and Isothermal Bainitizing of Additively Manufactured Nitrogen‐Enhanced Martensitic Chromium Steel

steel research international, EarlyView.
Tailored heat treatments transform additively manufactured high‐nitrogen martensitic Cr steel from austenitic as‐built condition to high‐hardness states. Isothermal bainitizing at 250°C generates an ultrafine nanostructure and achieves higher hardness than conventional hardening and tempering, highlighting a promising postprocessing route for laser ...
Philip König, Sebastian Weber, Jonathan Lentz   +2 more
wiley   +1 more source

Twinned substructure and hardening of low carbon lath martensite by high and atmospheric pressure quenching

Journal of Materials Research and Technology
A low carbon steel (0.2 wt% C) was quenched from 1000 °C under atmospheric quenching (APQ) into water, and under high pressure (HPQ) of 5 GPa at 10 °C/s. Both APQ and HPQ lead to lath martensite with twinned substructure, showing a hardness of 450 HV and
Liu Yang, Xinwei Wang, Chuanjia Du, Ning Lu, Changji Li, Hongwang Zhang   +5 more
doaj   +1 more source

Multifunctional and Recyclable Bio‐Based Vitrimers With Tunable Properties for Sustainable Digital Light Processing 4D Printing

SusMat, EarlyView.
A bio‐based, photocurable vitrimer system is developed for sustainable digital light processing (DLP) 4D printing. The material exhibits tunable thermomechanical properties, shapes memory and reconfigurability, and supports repair, reprocessing, and reprinting through dynamic covalent bond exchange, offering a recyclable and multifunctional platform ...
Yunmi Chae, Yeongseo Gwon, Woohwa Lee, Chang‐Geun Chae, Hyun Kim, Du Yeol Ryu, Yong Seok Kim, Dong‐Gyun Kim, Sungmin Park   +8 more
wiley   +1 more source

Recent progress on the development of hydrogel‐based microneedles for transdermal drug delivery

VIEW, EarlyView.
This study provides a comprehensive and up‐to‐date analysis of recent progress in HMN technology, covering fundamental transdermal delivery mechanisms and design principles, biomaterials used in HMN fabrication, drug loading and release strategies, and emerging therapeutic applications.
Mohammad Muhtasim Ittisaf, Salman Farsi Taharat, Md. Sadek Miah, Hasan Tasnim Salehin, M. Azam Ali, Shoeb Ahmed   +5 more
wiley   +1 more source

Effects of mechanical and chemical heterogeneity on the strength-ductility synergy of a heterostructured medium Mn steel

Journal of Materials Research and Technology
A medium Mn steel with both mechanical and chemical heterogeneities is designed in this study, demonstrating an excellent combination of high strength and ductility.
Yuming Zou, Haokun Zhu, Qihan Gao, Kaichao Xie, Jialin Chen, Hua Ding, Zhengyou Tang, Zhouhua Jiang   +7 more
doaj   +1 more source

Resistance Rapid Heating of Aluminum Coatings in an Extreme High Vacuum–Adequate Atmosphere for Hot Stamping

Advanced Engineering Materials, Volume 28, Issue 12, 17 June 2026.
The subject of this work is the development of a corrosion‐protective coating on steel sheets for form hardening. Rapid heating in an extreme high vacuum (XHV)‐adequate atmosphere is a useful method to prevent oxidation during alloying of 22MnB5 and aluminum to obtain a metallurgical bonding.
Lorenz Albracht, Alexander Schnettger, Ulrich Holländer, Sven Hübner, Bernd‐Arno Behrens, Hans Jürgen Maier   +5 more
wiley   +1 more source