Results 51 to 60 of about 226,851 (192)

Evaluation of the Methods for Estimating the Fully Reversed Unnotched Fatigue Limits of Steels

Advances in Materials Science and Engineering, 2019
Experimental determination of the fatigue limit is expensive considering the time and effort involved. To overcome this drawback, several empirical relations based on monotonic tensile properties and/or hardness have been developed for estimating the ...
Jing Li, Yuan-ying Qiu, Hai-dong Wang, Zhao-xi Wang   +3 more
doaj   +1 more source

A Novel Approach for ∆K Estimation in the Fatigue Threshold Region Based on ΔKth and Kmax,th

Fatigue &Fracture of Engineering Materials &Structures, Volume 49, Issue 2, Page 653-662, February 2026.
ABSTRACT A novel procedure, proposed by Kujawski and Vasudevan 1, has been evaluated as an alternative to the ASTM E647 standard for determining the ∆Kth and Kmax,th thresholds. This method relies solely on the actual propagation of cracks, which occurs only when both thresholds are satisfied simultaneously. For long cracks, a more efficient estimation
Pablo M. Cerezo, Jose A. Aguilera, Alejandro S. Cruces, Pablo Lopez‐Crespo   +3 more
wiley   +1 more source

Damage Behavior of Ni‐B and Ni‐B‐TiO2 Coatings on AISI P20 Steel Under Indentation and Bending

Fatigue &Fracture of Engineering Materials &Structures, Volume 49, Issue 2, Page 559-573, February 2026.
ABSTRACT This study examines the influence of TiO2 nanoparticles on the structure, mechanical properties, and fracture behavior of Ni‐B coatings applied to heat‐treated AISI P20 steel. Mechanical performance was assessed through indentation and step‐by‐step three‐point bending tests on both coated and uncoated substrates.
Amir Bahri, Mouna Kallel, Manel Ellouz, Khaled Elleuch, Thomas Kordisch   +4 more
wiley   +1 more source

Mix Proportion of Fly Ash Concrete Based on the Strength Contribution Ratio

JAPAN ARCHITECTURAL REVIEW, Volume 9, Issue 1, January–December 2026.
ABSTRACT This study aims to expand the use of fly ash concrete (FAC). Based on an experimental investigation of k values or the contribution of FA addition to the strength of ordinary Portland cement or Portland blast‐furnace slag cement type B, we propose and validate an environmentally friendly mix design for FAC.
Kenji Nishikigi, Yasuhiro Dosho, Phuong Dao Thi, Naoto Kondo   +3 more
wiley   +1 more source

Investigation and Optimization of The Effect of Anhydrous Borax Mineral on The Vickers Hardness and Indentation Modulus Values of Iron Material

MANAS: Journal of Engineering
In this study, 5% and 10% by weight of anhydrous borax (AHB) was added to the iron (Fe) matrix material by powder metallurgy method and the effects of the additive ratio on the Vickers hardness (HV), Brinell hardness (HB) and Indentation modulus (EIT ...
Talha Tunahan Kesemenli, Şenol Şahin, Ayşegül Bodur Yılmaz   +2 more
doaj   +1 more source

Surface properties and hardness of polypropylene composites filled with sunflower stalk flour [PDF]

BioResources, 2013
The effects of agricultural flour content on surface roughness, wettability, and surface hardness of injection molded polypropylene (PP) composites was investigated. Four content levels of the waste sunflower stalk flour (WSF) were mixed with the PP with
Alperen Kaymakci, Nadir Ayrilmis, Turker Gulec   +2 more
doaj  

Atomic‐Scale Insights into Nanoparticle Exsolution at Dislocations in Dislocation‐Engineered Catalysts

Advanced Materials, Volume 38, Issue 1, 2 January 2026.
This study reveals an atomic‐level correlation between bulk dislocations and the exsolution of surface nanoparticles through a novel approach for dislocation engineering in epitaxial thin films. Employing in situ scanning transmission electron microscopy, two primary reasons for the frequent nucleation of dislocation‐associated nanoparticles are ...
Moritz Lukas Weber, Moritz Kindelmann, Dylan Jennings, Jan Hölschke, Regina Dittmann, Joachim Mayer, Wolfgang Rheinheimer, Xufei Fang, Felix Gunkel   +8 more
wiley   +1 more source

Traceability for indentation measurements in Brinell-Vickers-Knoop hardness [PDF]

Hardness is an important material property describing a material's resistance to localized deformation from an indenter pressing or scraping against its surface.
Apostol, Tatiana, Genta, Gianfranco, Alić, Azmir, Ališić, Šejla, Turotti, Francesco, Fakić, Belma, Germak, Alessandro, Štibler, Anton, Prato, Andrea, Fidelus, Janusz, Pelit, Ercan, Kuzu, Cihan, Menelao, Febo, Affri, Renato, Borovský, Jiří, Reinstädt, Philipp, Loewit, Moritz, Hiti, Miha, Muminovic, Branka, Maculotti, Giacomo   +19 more
core   +2 more sources

Dislocation‐enhanced piezoelectric catalysis of KNbO3 crystal for water splitting

Journal of the American Ceramic Society, Volume 109, Issue 1, January 2026.
High‐density dislocations are introduced into potassium niobate crystals at room temperature using cyclic scratching with a Brinell indenter. Compared to the pristine sample, the dislocation‐engineered sample exhibits a two‐fold piezocatalysis efficiency for hydrogen production. Abstract Dislocations in oxides with ionic/covalent bonding hold potential
Hanyu Gong, Jiawen Zhang, Yan Zhao, Shan Xiang, Xiang Zhou, Oliver Preuß, Wenjun Lu, Yan Zhang, Xufei Fang   +8 more
wiley   +1 more source

Influence of Heat-Treatment on Enhancement of Yield Strength and Hardness by Ti-V-Nb Alloying in High-Manganese Austenitic Steel

Metals, 2019
To deal with the problem of poor yield strength and hardness in the initial use of high-manganese austenitic steel, we investigated the alloying design, microstructure, precipitates, mechanical properties, and comprehensive strengthening mechanism of ...
Zaifeng Zhou, Zhexuan Zhang, Quan Shan, Zulai Li, Yehua Jiang, Ru Ge   +5 more
doaj   +1 more source