Results 61 to 70 of about 30,077 (264)

Creep‐Induced Microstructural Evolution in an A2‐B2 Superalloy

Advanced Engineering Materials, EarlyView.
A 27.3Ta‐27.3Mo‐27.3Ti‐8Cr‐10Al (at.%) refractory high‐entropy alloy with precipitation‐strengthened A2‐B2 microstructure was studied by creep tests at 1030°C, which demonstrate a transition in deformation mechanisms in the range of 100–150 MPa applied stress. This is associated with changes in dislocation–precipitate interactions. Relevant deformation
Liu Yang, Aparajita Pramanik, Sandipan Sen, Shubhashis Dixit, Marcel Muench, R. J. Vikram, Daniel Schliephake, Yolita M. Eggeler, Ankur Chauhan, Martin Heilmaier, Alexander Kauffmann   +10 more
wiley   +1 more source

Role of heterogenous microstructure and deformation behavior in achieving superior strength-ductility synergy in zinc fabricated via laser powder bed fusion

International Journal of Extreme Manufacturing
Zinc (Zn) is considered a promising biodegradable metal for implant applications due to its appropriate degradability and favorable osteogenesis properties.
Zhi Dong, Changjun Han, Yanzhe Zhao, Jinmiao Huang, Chenrong Ling, Gaoling Hu, Yunhui Wang, Di Wang, Changhui Song, Yongqiang Yang   +9 more
doaj   +1 more source

Research progress in microstructure characterization and reconstruction of heterogeneous materials

Journal of Aeronautical Materials
Heterogeneous materials are widely used in high-end equipment components of fields such as aerospace，electronic information and national defense，with the microstructure features of multi-phase，multi-scale and complex morphology，which determines the ...
CHEN Yijia, MA Zhiyuan, ZHANG Tianxu, LIN Li   +3 more
doaj   +1 more source

Strong and ductile reduced activation ferritic/martensitic steel additively manufactured by selective laser melting

Materials Research Letters, 2019
Selective laser melting (SLM) was successfully applied to fabricate strong and ductile reduced activation ferritic/martensitic (RAFM) steel by introducing heterogeneous multi-/bimodal microstructure.
M. G. Jiang, Z. W. Chen, J. D. Tong, C. Y. Liu, G. Xu, H. B. Liao, P. Wang, X. Y. Wang, M. Xu, C. S. Lao   +9 more
doaj   +1 more source

High‐Temperature Nanoindentation of Metals: Assessing Thermal Drift, Frame Compliance, and Chemical Composition Effects on the Reported Mechanical Properties

Advanced Engineering Materials, EarlyView.
Do not let thermal drift and instrument artifacts deceive high‐temperature nanoindentation results. We compare classical Oliver–Pharr and automatic image recognition analyses across steels and a Ni alloy to quantify these effects. Accounting for artifacts reveals systematic softening with temperature, while Cr and Ni additions boost resistance ...
Velislava Yonkova, Steffen Brinckmann, Ruth Schwaiger   +2 more
wiley   +1 more source

Additive manufacturing of metals and alloys to achieve heterogeneous microstructures for exceptional mechanical properties

Materials Research Letters
Metals and alloys with heterogeneous microstructures exhibit an enhanced combination of strength and ductility, compared to their counterparts with homogeneous microstructures.
Haoxiu Chen, Yixiao He, Soumya Sobhan Dash, Yu Zou   +3 more
doaj   +1 more source

Current Status and Challenges in Data Collection for Aerospace Coatings Deposited by Plasma Spraying

Advanced Engineering Materials, EarlyView.
An innovative approach has been integrated into the GRENAT project to optimize plasma spraying and coating performance. Raw materials are accelerated and melted in the plasma generated by torches, creating coatings. Monitoring sensors collect process data which are combined with ex situ characterization data.
Lila Randriamananjara, Vincent Rat, Quentin Dubreuil, Patrice Valorge, Simon Goutier, Alain Denoirjean, Olivier Messe, Céline Ruelle, Jean‐Philippe Poli   +8 more
wiley   +1 more source

In Situ Micromechanical Study of Bimodal γ′–γ″ Precipitate Assemblies in Ni–Cr–Al–Nb Superalloy

Advanced Engineering Materials, EarlyView.
A Ni–Cr–Al–Nb superalloy with a bimodal γ′–γ″ precipitate distribution is developed. Composite precipitate assemblies form through heterogeneous nucleation, effectively impeding dislocation motion. Micropillar compression reveals high strength at room and elevated temperatures, governed by precipitate shearing, with coupled faulting mechanisms ...
Ujjval Bansal, Tae‐Hyeok Kang, Pyuck‐Pa Choi, Subin Lee, Christoph Kirchlechner   +4 more
wiley   +1 more source

Heterogeneous Distribution of Microstructure and Mechanical Properties in M2 High-Speed Steel Fabricated by Laser Powder Bed Fusion

Crystals
In this study, crack-free M2 high-speed steel (HSS) was successfully fabricated by laser powder bed fusion (L-PBF) using a relatively high substrate preheating temperature of 260 °C.
Yingkang Wei, Yufeng Zhang, Yunzhe Li, Yaojia Ren, Shihao Zhang, Xiaotong Zhang, Xin Chu, Shifeng Liu   +7 more
doaj   +1 more source

Electrochemical Behavior of Flame‐Sprayed Sc‐Doped AlCoCrFeMo High‐Entropy Alloy Coatings in 3.5% Sodium Chloride Solution

Advanced Engineering Materials, EarlyView.
Scandium (Sc)‐doped AlCoCrFeMo HEA coatings are fabricated via flame spraying with 0.1, 0.3, and 0.5 wt% Sc additions. Among these, the HEA‐Sc0.3 coating exhibits the highest corrosion resistance, indicated by a more positive corrosion potential and lower current density.
Pankaj Kumar, Akash Vyas, Mohammad Aatif Qazi, Nashit Jalal, Maria Ophelia Jarligo, Mostafa Yakout, Jing Liu, André McDonald   +7 more
wiley   +1 more source