High cyclic fatigue behaviour of ultrafine grained Al 5083 alloy

2014 ◽  
Vol 30 (14) ◽  
pp. 1835-1842 ◽  
Author(s):  
D. Singh ◽  
P. Nageswara Rao ◽  
R. Jayaganthan
Keyword(s):  
Cyclic Fatigue ◽  
Fatigue Behaviour ◽  
Ultrafine Grained ◽  
Al 5083 Alloy

The Residual Stresses Generated by Deep Rolling and their Stability in Fatigue & Application to Deep-Rolled Crankshafts

2006 ◽  
Vol 524-525 ◽  
pp. 45-50 ◽  
Author(s):  
H. Michaud ◽  
Jean Michel Sprauel ◽  
F. Galzy
Keyword(s):  
Residual Stresses ◽  
Fatigue Resistance ◽  
Experimental Validation ◽  
Crack Arrest ◽  
Cyclic Fatigue ◽  
Rolling Process ◽  
Fatigue Behaviour ◽  
Deep Rolling ◽  
Bending Fatigue ◽  
Compressive Residual Stresses

In this work, the effect of steel grade on the fatigue resistance of deep-rolled crankshafts is analysed. In the first part of this paper, the mechanisms leading to the increase of the fatigue resistance brought by the deep rolling treatment, is presented. This reinforcement is mainly linked to crack arrest due both to a decrease of the in-depth stress concentration factor and to remaining compressive residual stresses induced by the deep rolling. In a second part, an analytical model of residual stresses generation by deep-rolling and fatigue is presented. In this model the low cyclic fatigue behaviour of the steel is taken into account, and the residual stress stability with bending fatigue cycling can be predicted. After a presentation of the experimental validation on two different microstructures (baintic and ferrito- perlitic), this model is used for analysing the main parameters of the deep-rolling process and fatigue resistance.

Plastic and fatigue behaviour of ultrafine-grained magnesium

2008 ◽  
Vol 483-484 ◽  
pp. 477-480 ◽  
Author(s):  
Z. Trojanová ◽  
Z. Száraz ◽  
A. Mielczarek ◽  
P. Lukáč ◽  
W. Riehemann
Keyword(s):  
Fatigue Behaviour ◽  
Ultrafine Grained

Tensile Deformation and Fracture in a Bulk Nanostructured Al-5083/SiCp Composite at Elevated Temperatures

2007 ◽  
Vol 29-30 ◽  
pp. 245-248
Author(s):  
F. Tang ◽  
B.Q. Han ◽  
Masuo Hagiwara ◽  
Julie M. Schoenung
Keyword(s):  
Elevated Temperatures ◽  
Tensile Deformation ◽  
Tensile Tests ◽  
Nanostructured Composite ◽  
Sic Particles ◽  
Deformation And Fracture ◽  
Ultrafine Grained ◽  
Al 5083 Alloy

An ultrafine-grained Al-5083 alloy reinforced with 5 vol.% nano-sized β-SiC particles was fabricated with a powder cryomilling and consolidation technique. Tensile tests were conducted at temperatures from 298 to 773 K for this composite. The mechanisms for deformation and fracture of this nanostructured composite at various temperatures are discussed.

scholarly journals The cyclic-fatigue behaviour of an epoxy polymer modified with micron-rubber and nano-silica particles

2009 ◽  
Vol 44 (16) ◽  
pp. 4487-4490 ◽  
Author(s):  
C. M. Manjunatha ◽  
A. C. Taylor ◽  
A. J. Kinloch ◽  
S. Sprenger
Keyword(s):  
Epoxy Polymer ◽  
Cyclic Fatigue ◽  
Fatigue Behaviour ◽  
Silica Particles ◽  
Nano Silica

Cyclic fatigue behaviour of eutectoid aged Mg-PSZ ceramics with processing flaws

1993 ◽  
Vol 12 (3) ◽  
pp. 221-226 ◽  
Author(s):  
Tianshun Liu ◽  
Yiu-Wing Mai ◽  
Michael V. Swain
Keyword(s):  
Cyclic Fatigue ◽  
Fatigue Behaviour

scholarly journals Cyclic fatigue behaviour of hydrothermally aged 3Y-TZP ceramics in 4-point bending tests

2021 ◽  
Vol 15 (2) ◽  
pp. 184-194
Author(s):  
Renato Souza ◽  
Roberto Duarte ◽  
Manuel Alves ◽  
Juliana Daguano ◽  
Santos dos ◽  
...  
Keyword(s):  
Bending Strength ◽  
Ceramic Materials ◽  
Cyclic Fatigue ◽  
Fatigue Behaviour ◽  
Fatigue Tests ◽  
Bending Test ◽  
Test Results ◽  
Transformation Toughening ◽  
Bending Tests ◽  
M Phase

Fatigue is one of the most important properties to be considered in ceramic dental implants due to cyclic mechanical stresses arising from the chewing process. In this work, the fatigue behaviour of hydrothermally degraded ZrO2-based ceramics stabilized with 3mol% Y2O3 (3Y-TZP) was studied in 4-point bending tests. Samples of 3Y-TZP were compacted (100MPa), sintered at 1475 ?C for 2 h, polished and hydrothermally degraded in an autoclave as described in the ISO-13356 standard. The samples were characterized by their relative density, crystalline phase composition, microstructure and surface roughness. The highly dense (>99.6%TD) sintered 3Y-TZP ceramics has only tetragonal t-ZrO2 phase, even after hydrothermal ageing. Furthermore, the ceramic materials presented a Vickers hardness of 12.7?0.2GPa, a fracture toughness of 7.1?0.3MPa?m1/2 and a 4-point bending strength of 940.1?67MPa. Based on the bending test results 5 different stress levels for the fatigue tests were selected and conducted by cyclic 4-point bending obtaining the S-N curve. Weibull statistics was used for the statistical analysis. The fatigue tests indicate that the limit of fatigue resistance of this 3Y-TZP ceramics is around 550MPa, i.e. higher than the limits established in the ISO-13356 standard for the use of Y-TZP ceramics for the manufacture of implants. The fatigue behaviour of the investigated 3Y-TZP ceramics was related to the toughening mechanisms acting in Y-TZP ceramics, such as transformation toughening related to t?m phase transformation and microcracking.

Cyclic fatigue behaviour of fibre reinforced rubber-toughened nylon composite materials

2005 ◽  
Vol 123 ◽  
pp. 273-280
Author(s):  
L. Pinot ◽  
M. Gomina ◽  
J.-P. Jernot ◽  
R. Moreau ◽  
E. Nakache
Keyword(s):  
Composite Materials ◽  
Cyclic Fatigue ◽  
Fatigue Behaviour ◽  
Rubber Toughened ◽  
Nylon Composite

scholarly journals Problem of Pin Breakage in Equine Transfixation Pin Casting: Biomechanical Ex Vivo Testing of Four Different Pins

2019 ◽  
Vol 32 (03) ◽  
pp. 222-233
Author(s):  
Sara Keller ◽  
Sebastian Valet ◽  
Ann Martens ◽  
Bernhard Weisse ◽  
Anton Fürst ◽  
...  
Keyword(s):  
Cyclic Loading ◽  
Ex Vivo ◽  
Cyclic Fatigue ◽  
Fatigue Behaviour ◽  
Simplified Model ◽  
Testing Conditions ◽  
Metacarpal Bones ◽  
Ex Vivo Testing ◽  
Cycles To Failure ◽  
Steinmann Pin

Objective The aim of this study was to evaluate cyclic fatigue behaviour of a new pin with a thread run-out design in comparison with three other types of pins commonly used for equine transfixation pin casting. Materials and Methods Twenty-four pairs of equine cadaveric third metacarpal bones (MC3) equipped with one transfixation pin placed horizontally in the distal metaphysis were tested using a simplified model, mimicking the biomechanical situation of equine transfixation pin casting. A 6.3/8.0-mm Imex Duraface pin with thread run-out design (ITROP) was compared with a 6.1-mm smooth Steinmann pin (SSP), a Securos 6.2-mm, positive-profile pin (SPPP) and an Imex 6.3-mm, positive-profile pin (IPPP) under cyclic loading until failure in axial compression of MC3. Results All pins broke at clinically relevant load levels and cycle numbers. The SSP endured significantly (p = 0.0025) more cycles before failure (mean: 48685) than the ITROP (mean 25889). No significant differences in cycles to failure were observed comparing the SPPP versus ITROP, and the IPPP versus ITROP, respectively. Clinical Significance A thread run-out design does not necessarily lead to higher resistance against pin breakage under cyclic loading conditions. The SSP was most resistant against cyclic failure in these testing conditions, even though it was associated with more lateromedial displacement and cortical wear-out. This could outweigh reported disadvantages of the SSP such as reduced resistance to axial extraction and pin loosening.

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