Results 51 to 60 of about 8,845 (225)

Fabrication‐Driven Oxidation Pathways in Y/Hf‐Modified High‐Entropy Alloys: From Elemental Segregation to Oxide Homogeneity

Rare Metals, EarlyView.
ABSTRACT This study elucidates the oxidation mechanisms governing Y/Hf‐doped AlCoCrFeNiTi high‐entropy alloys (HEAs) and reveals the pivotal role of fabrication processes in dictating high‐temperature oxidation behavior. We demonstrate that casting and spark plasma sintering (SPS) promote Y/Hf segregation, resulting in heterogeneous oxide formation and
Huaqing Yi, Jiapeng Zheng, Jiawen Zhang, Yi Yang, Binbin He, Wenjun Lu   +5 more
wiley   +1 more source

Life prediction of a Ni-base superalloy

Bulletin of Materials Science, 2011
Rene 80 samples were creep–rupture tested in air between 1144 and 1255 K at various stress levels. The mean stress exponent, n, and the mean activation energy for creep were calculated from the experimental results. The accelerated creep life of the alloy was evaluated by using iso-stress parametric equations and Monkman–Grant method.
M AGHAIE-KHAFRI, M NOORI
openaire   +2 more sources

Novel Non‐Equimolar High‐Entropy Zirconates With Superior Thermophysical Properties

Rare Metals, EarlyView.
ABSTRACT Rare‐earth zirconates (RE2Zr2O7) are promising candidates for topcoat materials in thermal barrier coatings (TBCs). However, their practical application in TBCs is limited by poor fracture toughness and low thermal expansion coefficient (TEC).
Taoyi Lu, Zhiqin Wen, Suzhen Kang, Li Tang, Jiyuan Huang, Gaoxiang Wei, Rui Zhang, Yuhong Zhao   +7 more
wiley   +1 more source

Potential of carbide strengthened economical wrought nickel-based alloy for high temperature

Journal of Materials Research and Technology
A carbide strengthened wrought Ni-based superalloy is developed. The alloy depends on carbide dispersion strengthening. A high deformation plasticity in homogeneous alloy is shown in the 1100–1200 °C isothermal compression test and the improvement of ...
Shuo Chen, He Jiang, Fa Wang, Jianxin Dong   +3 more
doaj   +1 more source

Strength of nanoporous Ni-based superalloy membranes

Journal of Physics: Conference Series, 2010
Nanoporous Ni-based superalloy membranes are a new material class. They are fabricated from the two phase γ/γ' base material by thermomechanical processing, followed by selective phase extraction. Compared to other metallic membrane materials, they stand out due to an extremely regular and fine channel-like porosity on the nanoscale.
J Rösler, O Näth
openaire   +1 more source

Mechanical Properties of Powder Injection Molded Ni-Based Superalloys [PDF]

Advanced Materials Research, 2011
This paper describes the microstructural and mechanical properties of powder injection moulded (PIM) Ni based superalloys. Ni-based superalloys were mixed with a polymeric binder (paraffin wax, carnauba wax, stearic acid and PP) and injection moulded as standard tensile bars. The critical powder loading for injection moulding were 62.5 vol.
Gulsoy, H. Ozkan, Ozbek, Sunullah, Gunay, Volkan, Baykara, Tarik   +3 more
openaire   +2 more sources

Coalescence‐Ripening Mechanism of γ′−Ni3(Al, Ti) During Long‐Term/High‐Temperature Operation of Ni‐Based Superalloy Discs

Rare Metals, EarlyView.
ABSTRACT The evolution of the γ′−Ni3(Al, Ti) phase in superalloys is governed by a coupled coalescence‐ripening mechanism driven by elemental diffusion. In this study, thermal exposure experiments were performed at 750°C and 800°C for durations ranging from 100 to 20,000 h.
Zhaotian Wang, Yongquan Ning, Bingchao Xie, Xiaoguang Fan, Mei Zhan, Mingwang Fu   +5 more
wiley   +1 more source

Correction to: Effect of Hot Deformation Parameters on the Dissolution of γ′ Precipitates for As-Cast Ni-Based Superalloys [PDF]

, 2021
Zhipeng Wan, Jingyuan Shen, Tao Wang, Wei Kang, Zhao Li, Sen Yan, Meng Liu, Lianxi Hu   +7 more
openalex   +1 more source

Regulating TGO Nucleation and Growth of MCrAlX Coatings via Femtosecond Laser Remelting: The Role of Reactive Elements in the Oxidation Resistance

Rare Metals, EarlyView.
ABSTRACT MCrAlX coatings are widely used as bond coats in thermal barrier coating systems to protect turbine blades from high‐temperature oxidation. However, their oxidation resistance is often restricted by uncontrolled microstructures, surface roughness, and aggregation of reactive elements (REs). In this study, high‐repetition‐rate femtosecond laser
Wei Qian, Xiangcheng Li, Yinqun Hua, Xiaofeng Zhang, Yong Feng, Xiaonan Wang, Szymon Tofil, Jie Cai   +7 more
wiley   +1 more source

On Crystal Mosaicity in Single Crystal Ni-Based Superalloys [PDF]

Crystals, 2019
In the present work, we investigate the evolution of mosaicity during seeded Bridgman processing of technical Ni-based single crystal superalloys (SXs). For this purpose, we combine solidification experiments performed at different withdrawal rates between 45 and 720 mm/h with advanced optical microscopy and quantitative image analysis.
Philipp Hallensleben, Felicitas Scholz, Pascal Thome, Helge Schaar, Ingo Steinbach, Gunther Eggeler, Jan Frenzel   +6 more
openaire   +3 more sources