Results 41 to 50 of about 2,269 (228)

Effect of Intercritical Annealing Parameters and Starting Microstructure on the Microstructural Evolution and Mechanical Properties of a Medium-Mn Third Generation Advanced High Strength Steel

Metals, 2022
A prototype medium-Mn TRIP steel (0.2 C–6 Mn–1.7 Si–0.4 Al–0.5 Cr (wt %)) with a cold-rolled tempered martensite (CR) and martensitic (M) starting microstructures was subjected to continuous galvanizing line (CGL) compatible heat treatments. It was found
Kazi M. H. Bhadhon, Xiang Wang, Elizabeth A. McNally, Joseph R. McDermid   +3 more
doaj   +1 more source

High‐Entropy Alloy Interlayers Toward Advanced Joining for High‐Performance Structural Applications: Current Progress and Emerging Challenges

Advanced Engineering Materials, EarlyView.
HEA interlayers offer a versatile route for joining high‐performance structural materials. Their compositional and structural design regulates interfacial reactions, suppresses brittle IMCs, and improves metallurgical bonding. Sandwich interlayers further integrate defect healing with precipitation strengthening, enabling improved strength–ductility ...
Lin Yuan, Jiafen Song, Jinglong Li, Jiangtao Xiong, Tao Yang   +4 more
wiley   +1 more source

Retained austenite in multipass high-strength weld metal with a yield strength exceeding 1100 MPa

Journal of Materials Research and Technology
Retained austenite is an essential phase in various types of steel due to its ability to positively influence mechanical properties. However, in the research field of high-strength weld metals, it is typically considered only as part of martensite ...
Daniel Schrittwieser, Nicole Rinnhofer, David Obersteiner, Hannes Pahr, Oleksandr Glushko, Ronald Schnitzer   +5 more
doaj   +1 more source

Quenching and Partitioning of Multiphase Aluminum-Added Steels

Metals, 2019
The quenching and partitioning response following intercritical annealing was investigated for three lean TRIP-type high-Al steel compositions. Depending on the intercritical austenite fraction following annealing, the steels assumed either a ferrite ...
Tuomo Nyyssönen, Olli Oja, Petri Jussila, Ari Saastamoinen, Mahesh Somani, Pasi Peura   +5 more
doaj   +1 more source

Austenite formation and cementite dissolution during intercritical annealing of a medium-manganese steel from a martensitic condition

Materials & Design, 2021
In the present study, in situ high-energy X-ray diffraction (HEXRD), dilatometry, and metallography were conducted for the purpose of understanding microstructure evolution during intercritical annealing of a Fe-0.19C-4.39Mn steel from a martensitic ...
J.J. Mueller, X. Hu, X. Sun, Y. Ren, K. Choi, E. Barker, J.G. Speer, D.K. Matlock, E. De Moor   +8 more
doaj   +1 more source

Effect of Cu and CuP Additions on the Microstructure and Nanoindentation‐Based Fracture Behavior of CoNiAlSi Ferromagnetic Shape Memory Alloys

Advanced Engineering Materials, EarlyView.
Cu and combined Cu–P microalloying refine the microstructure and enhance the nanoindentation‐derived fracture resistance of CoNiAlSi ferromagnetic shape memory alloys without suppressing the martensitic transformation. Comparative SEM, DSC, and nanoindentation results reveal that the CuP‐containing alloy provides the most balanced response, achieving ...
Mehmet Demir
wiley   +1 more source

Controlling the work hardening of martensite to increase the strength/ductility balance in quenched and partitioned steels

Materials & Design, 2017
The role of retained austenite on tensile behavior in quenched and partitioned (Q&P) steels has been studied extensively, but the deformation behavior of martensite, which comprises the majority of Q&P microstructures, has received less attention.
K.O. Findley, J. Hidalgo, R.M. Huizenga, M.J. Santofimia   +3 more
doaj   +1 more source

Behavior of Retained Austenite on Spring Steel

Transactions of Japan Society of Spring Engineers, 1993
ばね鋼における残留オーステナイトの機械的, 熱的挙動を調査した。 従来ばねにおける残留オーステナイトは, 焼戻し過程で分解してしまうため特に注目されていなかったが, 耐へたり性向上のための高Si化及び高強度化のための焼戻し温度の低下により, 使用状態でも残留オーステナイトは残存しうる。残留オーステナイトは, 加工誘起変態によりマルテンサイト化することが知られているが, 本実験において衝撃破壊やショットピーニングにより変態が進行することが確かめられた。
openaire   +2 more sources

Dynamically Actuated Reconfigurable Topographical Surface Enables Active Control of Implant‐Associated Infections

Advanced Functional Materials, EarlyView.
A dynamically actuated reconfigurable topographical surface (DARTS) integrates contact‐mediated bactericidal nanotopography with programmable mechanical actuation to actively disrupt bacterial biofilms. Dynamic surface reconfiguration enhances bacterial killing and suppresses implant‐associated infections in vivo, providing a new strategy for active ...
Mohammad Asadi Tokmedash, Jihun Lee, J. Scott VanEpps, Sungmin Nam, Jouha Min   +4 more
wiley   +1 more source

3D Liquid Crystal Framework Enclosing Dual Compartments

Angewandte Chemie, EarlyView.
A new type of liquid crystal phase is reported, having the conjugated rod‐like molecular cores form a 3D framework of elongated octahedral cages filled alternatively with alkyl and fluoroalkyl pendant chains. The cages are held together by flexible H‐bonding hinges, making them adaptable to thermal expansion and stable in a wide temperature range.
Yang‐yang Zhao, Huan‐jun Lu, Helgard Ebert, Xiang‐bing Zeng, Chunlan Ma, Feng Liu, Carsten Tschierske, Goran Ungar   +7 more
wiley   +2 more sources