Results 111 to 120 of about 222,640 (305)

Microstructure and Fatigue Property of MB8 Magnesium Alloy Cross Welded Joints with Ultrasonic Impact

Cailiao gongcheng, 2018
Surface treatment was carried out on the weld toe of MB8 magnesium alloy welded joints with ultrasonic impact treatment(UIT) method. The Surface microstructure and the fatigue property of treated and as-welded MB8 magnesium alloy welded joints were ...
HE Bo-lin, JIANG Ming-ming, YU Ying-xia, LI Li   +3 more
doaj   +1 more source

"Frostbite effect" of red sandstone under high strain rates

工程科学学报, 2019
Under the action of negative temperature, the static strength of a rock increases; however, the rock will tend to be brittle, failure strain will decrease, and the rock will also bear the action of internal ice heave force, which leads to complex dynamic
YANG Yang, YANG Ren-shu
doaj   +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

Influence of Complex Lithology Distribution on Fracture Propagation Morphology in Coalbed Methane Reservoir

Applied Sciences
The mineral composition in coalbed methane (CBM) reservoirs significantly influences fracture morphology, making the description of reservoir heterogeneity challenging. This study develops a fracture propagation model for CBM reservoirs that incorporates
Weiping Ouyang, Luoyi Huang, Jinghua Liu, Mian Zhang, Guanglong Sheng   +4 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

Progress of fracture mapping technology based on CT three-dimensional reconstruction

Frontiers in Bioengineering and Biotechnology
Fracture Mapping is a new technology developed in recent years. This technology visually representing the morphology of fractures by overlaying fracture lines from multiple fracture models onto a standard model through three-dimensional reconstruction ...
Jichao Liu, Ziyan Zhang, Ji Qu, Chengdong Piao   +3 more
doaj   +1 more source

Fracture Toughness and Fracture Morphology of Sintered Tungsten Alloys.

Journal of the Society of Materials Science, Japan, 1993
Fracture toughness tests of W-Ni-Fe sintered tungsten alloys with various volume fractions of tungsten particles were carried out under various loading rates. Fracture toughness of the sintered tungsten alloys decreased with increasing volume fraction of tungsten particles.
Satoshi KOBAYASHI, Kunihiro ICHIKAWA, Yoshiharu MUTOH   +2 more
openaire   +2 more sources

Cathodic Cage Plasma Deposition of Nanostructured Cu–Fe–Se Coatings on Poly(methyl Methacrylate)

Advanced Engineering Materials, EarlyView.
Nanostructured Cu–Fe–Se coatings are deposited on PMMA by a modified cathodic cage plasma process, enabling low‐temperature deposition on polymer substrates. A transition from discontinuous to compact morphology is observed with temperature, with optimal properties at 200°C, where improved CuFeSe2‐type bonding, lowest sheet resistance, and favorable ...
V. S. S. Sobrinho, M. Naeem, T. H. C. Costa, M. S. Libório, J. C. A. Queiroz, C. B. B. Luna, R. R. M. Sousa, P. S. Vieira, E. M. Araújo   +8 more
wiley   +1 more source

Experimental Study on the Influence of Supercritical CO2 on Shale Fracture Morphology

Shiyou jixie
In the ahead fracturing process of supercritical carbon dioxide （SC-CO2）， the injected CO2 is easy to enter the porous media of shale， and combined with the formation water or water-based fracturing fluid to form a slightly acidic fluid， thus stimulating
Wu Hua, Wang Xiaoqiong, Ge Hongkui, Wang Haige, He Jixiang, Zhang Yanlong, Wang Jianyong   +6 more
doaj   +1 more source

The fracture morphology of nickel-base superalloys tested in fatigue and creep-fatigue at 650 C [PDF]

The fracture surfaces of compact tension specimens from seven nickel-base superalloys fatigue tested at 650 C were studied by scanning electron microscopy and optical metallography to determine the nature and morphology of the crack surface in the region
Gayda, J., Miner, R. V.
core   +1 more source