Results 31 to 40 of about 2,345 (276)

Investigation of Strain-Induced Precipitation of Niobium Carbide in Niobium Micro-Alloyed Steels at Elevated Temperatures

Metals, 2022
Two steels with a base composition of Fe-0.2C-0.8Mn-1.2Cr (wt%) but with different niobium (Nb) contents (0.02 and 0.03 wt%) were employed to study the effect of precipitate evolution on the softening resistance in the austenite region under elevated ...
Tzu-Ching Tsao, Po-Han Chiu, Chien-Yu Tseng, Cheng-Lin Tai, Hsueh-Ren Chen, Tsai-Fu Chung, Chih-Yuan Chen, Shing-Hoa Wang, Yu-Ting Tsai, Jer-Ren Yang   +9 more
doaj   +1 more source

Enrichment of ferroniobium from Bayan Obo tailings using selective carbonization roasting and magnetic separation

Journal of Materials Research and Technology
This research presents a novel approach to beneficiate ferroniobium from Bayan Obo tailings (BOT) by combining selective carbonization roasting with magnetic separation.
Shaoyang Chang, Mingjun Rao, Boqi Wang, Tao Jiang, Guanghui Li, Zhao Yang, Zhongshuai Jia   +6 more
doaj   +1 more source

Changes in the acid resistance of erythrocytes upon contact with TiC, TiN, Ti-Nb, Ti-Zr and Ti-Ta compositions

Russian Open Medical Journal
Background — There is a high demand for new implant materials in traumatology, orthopedics and dentistry. Biodegradation of titanium alloys leads to undesirable effects that reduce the quality of life in patients with implants.
Petr A. Ilchenko, Elena N. Sazonova, Alexander A. Burkov   +2 more
doaj   +1 more source

Thermomechanical Fatigue and Creep–Fatigue Interaction of Inconel 718 Additively Manufactured by Laser Beam Powder Bed Fusion

Advanced Engineering Materials, EarlyView.
Thermomechanical fatigue tests of laser beam powder bed fusion (PBF‐LB) Inconel 718 show that the additively manufactured material reaches almost the lifetimes of conventionally‐rolled material under no‐dwell conditions. Introducing dwell times at the maximum temperature markedly reduces the lifetimes due to pronounced grain boundary sliding associated
Stefan Guth, Tomáš Babinský, Jan Lars Riedel, Wen Hao Kan, Aijun Huang, Martin Heilmaier, Ivo Šulák   +6 more
wiley   +1 more source

Influence of Niobium Addition on Microstructure and Machinability of High Chromium Cast Iron

Materials Research, 2021
High Chromium Cast Iron (HCCI) is mostly utilised in environments under severe abrasion and corrosion wear conditions, and research on this material with added niobium obtained positive results regarding wear resistance.
Anderson Edson da Silva, Ismael Nogueira Rabelo de Melo, Ivete Peixoto Pinheiro, Leonardo Roberto da Silva   +3 more
doaj   +1 more source

Niobium’s Effect on the Properties of a Quasi-High-Entropy Alloy of the CoCrFeMnNi System

Metals
This paper deals with the possibility of smelting quasi-high-entropy alloys (QHEAs) with the partial use of ferroalloys in the charge instead of pure metals.
Svetlana Kvon, Aristotel Issagulov, Vitaliy Kulikov, Saniya Arinova   +3 more
doaj   +1 more source

Influence of Milling and Use of Ni and Al Containing Metal Binder in NbC-Based Cermets

Materials Research, 2023
This study presents the development of niobium carbide cermets bound to nickel and Ni-12Al (wt%). The use of Ni-12Al (wt%) and Ni aims to replace strategic elements such as cobalt (Co) utilized in tungsten carbide-based cermets.
Evandro Dematte, Eliana Franco, Júlio Milan, César Edil da Costa   +3 more
doaj   +1 more source

Slip Localization Intensification Mediated by Grain Boundary Sliding in a Polycrystalline Nickel‐Based Superalloy

Advanced Engineering Materials, EarlyView.
The temperature dependence of fatigue behavior in nickel‐based superalloys is investigated through high‐resolution measurements of plastic localization. While increasing temperature reduces localization and enhances fatigue performance in René 88DT, Inconel 718 exhibits a sharp degradation at intermediate temperature due to intensified slip ...
M. Calvat, D. Anjaria, I. Woo, C. Bean, D. Texier, J. C. Stinville   +5 more
wiley   +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

New insights into the formation mechanism of the multicomponent carbides (Nb, M)C (M = Ti, Cr and Mn)

Journal of Materials Research and Technology
Combining first-principles calculations and classical nucleation theory, the results of elemental doping on the structure, electrons and stability of niobium carbides are investigated.
Shi Cheng, Tingping Hou, Dong Zhang, Zhihui Wang, Chaochao Yin, Xianming Pan, Xiaojie Liu, Shue Hu, Kaiming Wu   +8 more
doaj   +1 more source