Results 101 to 110 of about 222,640 (305)

High-Frequency Ultrasonic Impact Treatment Effect on Fatigue Properties of TC4 Titanium Alloy Laser Wire Filling-Welded Joints [PDF]

Archives of Metallurgy and Materials
This study aimed to improve the fatigue properties of TC4 titanium alloy laser-filled wire welded joints. To this end, the highfrequency ultrasonic impact technology (UIT) was used to implement post-weld impact treatment on the welded part ...
Aiyong Cui, Jialei Zhao, Borong Shan, Haodong Liu, Weiqi Sun, Fangyou Hu, Huakai Wei   +6 more
doaj   +1 more source

Fatigue Crack Initiation and Growth in Nanocrystalline Ni at Multiple Length‐Scales

Advanced Engineering Materials, EarlyView.
Overview of miniaturized in situ SEM fatigue setup and resultant fatigue crack growth data for nanocrystalline Ni. The presented study focuses on the analysis of fatigue crack growth rate (FCGR) in focused ion beam‐notched microcantilevers prepared from nanocrystalline (NC) Ni as a model material.
Igor Moravcik, Alexander Jelinek, Markus Alfreider, Jutta Luksch, Anton Hohenwarter, Florian Schaefer, Christian Motz, Daniel Kiener   +7 more
wiley   +1 more source

Fracture morphology of variable pumping-rate hydraulic fracturing in middle and deep coal reservoirs

Petroleum Exploration and Development
Outcrop coal samples from the Shizhuang South Block of the Qinshui Basin, Shanxi Province, China, were subjected to true triaxial hydraulic fracturing experiments to simulate frature propagation.
Shikang LIU, Yushi ZOU, Wenfeng MA, Shicheng ZHANG, Xuan WANG, Mingzhe HAN, Budong GAO   +6 more
doaj   +1 more source

Creep Properties and Deformation Mechanism of Additively Manufactured NiAl‐CrMo Composites

Advanced Engineering Materials, EarlyView.
Additively manufactured NiAl‐CrMo composites contain numerous interfaces and cell boundaries that control their creep response. At 700°C under high applied stress, creep is dominated by dislocation‐controlled power‐law mechanisms. At 800°C–900°C and lower stresses, creep is primarily diffusion‐controlled along cell boundaries.
Jan Vollhüter, Andreas Bezold, Johan Westraadt, Katharina Fiegl, Subham Chattoraj, Benjamin Wahlmann, Carolin Körner, Michael Mills, Mathias Göken, Steffen Neumeier   +9 more
wiley   +1 more source

Effect of V-notch radius on mechanical properties of TA15 titanium alloy

Cailiao gongcheng
To study the impact of V-notch radius on the mechanical properties of TA15 titanium alloy，tensile，stress-rupture，fatigue tests and fracture analysis are conducted on both smooth specimens and those with varing V-notch radii.
CUI Wenming, ZHANG Xiaochen, WANG Wei, LI Zhutie, LIANG Xibing, ZANG Haoliang, ZHANG Kai   +6 more
doaj   +1 more source

Enhanced Strength and Corrosion Resistance of Ti‐13Nb‐12Ta‐10Zr‐4Sn Alloy by Aging Treatment

Advanced Engineering Materials, EarlyView.
This work systematically investigates the effect of aging treatment on mechanical properties and corrosion behavior of vacuum arc‐melted Ti‐13Nb‐12Ta‐10Zr‐4Sn alloy. Owing to the increased α″ martensite, strength and corrosion resistance were significantly enhanced by aging treatment.
Yuhua Li, Rong Zhao, Qian Zhang, Haojie Wang, Yujing Liu, Lai‐Chang Zhang   +5 more
wiley   +1 more source

Experimental investigation on influencing factors of CO2 huff and puff under fractured low‐permeability conditions

Energy Science & Engineering, 2019
The fracture system is a vital component of fractured low‐permeability reservoirs. The presence of fractures can improve reservoir flow capacity and injected carbon dioxide (CO2) utilization, thus leading to higher oil recovery.
Binfei Li, Hao Bai, Aishan Li, Liaoyuan Zhang, Qiliang Zhang   +4 more
doaj   +1 more source

Pattern formation and selection in quasi-static fracture

, 2000
Fracture in quasi-statically driven systems is studied by means of a discrete spring-block model. Developed from close comparison with desiccation experiments, it describes crack formation induced by friction on a substrate.
A. Groisman, A. T. Skjeltorp, B. Lawn, J. S. Langer, J. T. Neal, J. V. Andersen, J. V. Andersen, J. W. Hutchinson, J. Walker, K. M. Crosby, K.-t. Leung, Kwan-tai Leung, M. Kachanov, P. S. Stevens, S. Boettcher, S. Kitsunezaki, T. Hornig, Y. Bréchet, Zoltan Néda   +18 more
core   +1 more source

Direct Metal Deposition of Graphene–Ti28Nb35.4Zr Matrix Composites With Enhanced Mechanical, Corrosion, and Biocompatibility Properties for Bone Implants

Advanced Engineering Materials, EarlyView.
Graphene nanoplatelet (0.1 wt.%) reinforcement significantly enhances the performance of β Ti‐28Nb‐35.4Zr alloy. Grain refinement, reduced water contact angle, and improved surface characteristics promote osteoblast adhesion and complete surface coverage after 7 days.
Khurram Munir, Jixing Lin, Yuncang Li, Li Zhu, Paul F. A. Wright, Cuie Wen   +5 more
wiley   +1 more source

Classification and pathoanatomy of posterior malleolus fracture based on posterior malleolus-associated ligaments and ankle stability

Journal of Orthopaedic Translation
Background: The clinical significance of previous posterior malleolus fracture classifications is limited because they are mainly based on fracture morphology. On the basis of posterior malleolus-associated ligaments and ankle stability, injury mechanism,
Yongqi Li, Yi Liao, Rui Luo, Tian Zhao, Shun Wang, Yunfeng Yang   +5 more
doaj   +1 more source