Results 81 to 90 of about 360,909 (306)

On the exceptional damage-tolerance of gradient metallic materials [PDF]

, 2020
An experimental study is described on the fracture toughness and micro-mechanisms associated with the initiation and propagation of cracks in metallic nickel containing marked gradients in grain size, ranging from ∼30 nm to ∼4 μm.
Cao, R, Li, Y, Lin, Y, Pan, J, Ritchie, RO, Sweet, A, Yu, Q   +6 more
core  

Influence of corrosion and creep on intergranular fatigue crack path in 2XXX aluminium alloys [PDF]

, 2010
In this paper, two examples of the influence of time-dependent processes on crack path in two 2XXX aluminium alloys are presented. The first example is concerned with corrosion–fatigue crack growth resistance of a 2024 T351 alloy cracked in the S–L ...
Hénaff, Gilbert, Menan, Frédéric, Odemer, Grégory   +2 more
core   +3 more sources

Al–Cu Composite Casting of Laser‐Deoxidized Copper: Bonding, Interfacial Chemistry, and Thermal Conductivity

Advanced Engineering Materials, EarlyView.
This study investigates laser‐based oxide removal of Cu inserts in oxygen‐free conditions and examines long‐term oxidation kinetics and surface chemistry under different atmospheres via X‐ray photoelectron spectroscopy. Al–Cu compound casting with differently oxidized surfaces is performed, and intermetallic phase formation, morphology, and thermal ...
Timon Steinhoff, Finn‐Lennard Janthur, Sascha Zimmermann, Sarah Seffer, Jörg Hermsdorf, René Gustus, Ludger Overmeyer, Wolfgang Maus‐Friedrichs, Hans Jürgen Maier, Christian Klose   +9 more
wiley   +1 more source

Comparative evaluation of microcrack formation and fracture resistance of root dentin with the use of three different rotary files: An in vitro study

Journal of Oral Research and Review
Background: Successful endodontic treatment requires thorough cleaning, shaping, and obturation of the root canal. Introduction of nickel–titanium rotary files has improved canal shaping; however, their effect on root dentin can differ and influence the ...
Paridhi Maheshwari, Sayantan Mukherjee, Ipsita Maity, Paromita Mazumdar   +3 more
doaj   +1 more source

Effect of Direct Composite and Indirect Ceramic Onlay Restorations on Fracture Resistance of Endodontically Treated Maxillary Premolars

Frontiers in Dentistry, 2020
Objectives: Fracture of endodontically treated restored teeth is a common concern. Premolars are subjected to high shear and tensile forces. This study aimed to assess the fracture resistance and fracture mode of endodontically treated premolars restored
Haleh Kazemi Yazdi, Niusha Sohrabi, Shahbaz Nasser Mostofi   +2 more
doaj   +1 more source

Size Effect in Fracture: Roughening of Crack Surfaces and Asymptotic Analysis

, 2002
Recently the scaling laws describing the roughness development of fracture surfaces was proposed to be related to the macroscopic elastic energy released during crack propagation [Mor00].
A. B. Mosolov, A. Carpinteri, A. S. Balankin, E. Bouchaud, E. Bouchaud, E. Bouchaud, Elisabeth Bouchaud, F. M. Borodich, F. Plouraboué, Gérard Valentin, J. M. López, J. M. López, J. Schmittbuhl, M. Hori, M. Kachanov, R. H. Dauskardt, S. Das Sarma, S. Morel, S. Morel, Stéphane Morel, T. Engøy, W. Weibull, Z. P. Bažant, Z. P. Bažant, Z. P. Bažant, Z. P. Bažant, Z. P. Bažant   +26 more
core   +1 more source

Assessing Altered Coating Adhesion on Plasma‐Deoxidized Surfaces Under Oxygen‐Free Conditions

Advanced Engineering Materials, EarlyView.
This study demonstrates the effectiveness of atmospheric pressure plasma pretreatment in modifying silicon and stainless steel surfaces to improve adhesion. Argon‐hydrogen plasma increases surface roughness and improves adhesion strength, whereas pure argon results in smoother surfaces and structural changes.
Selina Raumel, Lara Kuhr, Khemais Barienti, Sebastian Herbst, Florian Nürnberger, Hans Jürgen Maier, Marc C. Wurz   +6 more
wiley   +1 more source

Thermal shock and erosion resistant tantalum carbide ceramic material [PDF]

, 1978
Ceramic tantalum carbide artifacts with high thermal shock and mechanical erosion resistance are provided by incorporating tungsten-rhenium and carbon particles in a tantalum carbide matrix. The mix is sintered by hot pressing to form the ceramic article
Honeycutt, L., III, Manning, C. R.
core   +1 more source

On Measurement and Interpretation of Toughness Behaviour of Carbide Tools [PDF]

, 1981
The actual significance of any definition of toughness behaviour of carbide tools depends on the existence of an interrelation between the quality as defined and the occurrence of chipping and premature failure in cutting.
Kals, H.J.J.
core   +2 more sources

Effect of calcium hydroxide on the fracture resistance of dentin

Journal of Research of the National Institute of Standards and Technology, 2011
An increased incidence of fracture has been reported in teeth where root canals were treated with calcium hydroxide. Edge chipping is one test used to measure the resistance of brittle materials to fracture. Presently, no studies have reported on edge chipping in teeth.
Whitbeck, Evan R., Quinn, George D., Quinn, Janet B.   +2 more
openaire   +2 more sources