Fatigue strength and cyclic crack resistance of titanium alloy VT3-1 in different structural states. Communication 2. Procedure for considering the effect of structure on fatigue limit

1995 ◽  
Vol 27 (5-6) ◽  
pp. 252-256 ◽  
Author(s):  
V. T. Troshchenko ◽  
B. A. Gryaznov ◽  
Yu. S. Nalimov ◽  
O. N. Gerasimchuk ◽  
O. M. Ivasishin ◽  
...  
Keyword(s):  
Titanium Alloy ◽  
Fatigue Strength ◽  
Crack Resistance ◽  
Fatigue Limit ◽  
Cyclic Crack Resistance ◽  
Effect Of Structure

Fatigue strength and cyclic crack resistance of titanium alloy VT3-1 in different structural states. Communication 1. Study procedure and experimental results

1995 ◽  
Vol 27 (5-6) ◽  
pp. 245-251 ◽  
Author(s):  
V. T. Troshchenko ◽  
B. A. Gryaznov ◽  
Yu. S. Nalimov ◽  
O. N. Gerasimchuk ◽  
O. M. Ivasishin ◽  
...  
Keyword(s):  
Titanium Alloy ◽  
Fatigue Strength ◽  
Crack Resistance ◽  
Cyclic Crack Resistance ◽  
Experimental Results

Cyclic crack resistance of VT22 titanium alloy

1985 ◽  
Vol 17 (7) ◽  
pp. 901-904
Author(s):  
B. V. Boitsov ◽  
A. A. Gusenkov ◽  
A. S. Ponomarev ◽  
Yu. V. Petukhov
Keyword(s):  
Titanium Alloy ◽  
Crack Resistance ◽  
Cyclic Crack Resistance ◽  
Vt22 Titanium Alloy

Cyclic crack resistance to VT20 titanium alloy sheets and its anisotropy

1980 ◽  
Vol 16 (2) ◽  
pp. 147-151 ◽  
Author(s):  
S. Ya. Yarema ◽  
V. V. Grechko ◽  
O. P. Ostash
Keyword(s):  
Titanium Alloy ◽  
Crack Resistance ◽  
Cyclic Crack Resistance ◽  
Vt20 Titanium ◽  
Vt20 Titanium Alloy

scholarly journals Effect of micro-notches on fatigue strength of electrodeposited nanocrystalline nickel thin films

2018 ◽  
Vol 165 ◽  
pp. 04011
Author(s):  
Keisuke Tanaka ◽  
Yuta Murase ◽  
Hirohisa Kimachi
Keyword(s):  
Thin Films ◽  
Fatigue Strength ◽  
Fatigue Limit ◽  
Stress Ratio ◽  
Fatigue Crack Initiation ◽  
Fatigue Tests ◽  
Fine Grained ◽  
Nickel Thin Films ◽  
Nano Crystalline ◽  
Fictitious Crack

The effect of micro-notches on the fatigue strength of nickel thin films was studied. Two types of thin films with 10 μm thickness were produced by electrodeposition using sulfamate solution without and with brightener: ultra-fine grained film (UFG) with the grain size of 384 nm and nano-crystalline grained film (NCG) with that of 17 nm. Micro-sized notches introduced by FIB had the width of 2 μm and various depths from 8 to 150μm. Fatigue tests were conducted under the stress ratio of 0.1. The fatigue strength decreased with increasing depth of notches. NCG had much higher strength than UFG compared at the same notch depth. Notches as small as 8μm did reduce the fatigue strength of both UFG and NCG. The fatigue limit was controlled by the initiation of cracks and no non-propagating crack was observed in specimens fatigued below the fatigue limit. A model of fictitious crack successfully predicted the reduction of the fatigue limit due to micro-notches. The characteristic crack length of NCG was much smaller than the UFG, while the fatigue strength of defect-free NCG was larger than that of UFG. SEM observation of fracture surfaces was conducted to reveal micromechanisms of fatigue crack initiation.

scholarly journals Fatigue Strength Analysis of S34MnV Steel by Accelerated Staircase Test

2020 ◽  
Vol 10 (1) ◽  
pp. 394-400 ◽  
Author(s):  
I. M. W. Ekaputra ◽  
Rando Tungga Dewa ◽  
Gunawan Dwi Haryadi ◽  
Seon Jin Kim
Keyword(s):  
Standard Deviation ◽  
Fatigue Strength ◽  
Fatigue Limit ◽  
Fatigue Testing ◽  
Reliability Estimation ◽  
Test Method ◽  
Strength Analysis ◽  
Staircase Method ◽  
Staircase Test ◽  
Number Of Cycles

AbstractThis paper presents the reliability estimation of fatigue strength of the material used for crank throw components. The material used for crank throw components is forged S34MnV steel and subsequently heat-treated by normalising and tempering. High cycle fatigue testing under fully reversed cycling (R = −1) was performed to determine the fatigue limit of the material. The staircase test method is used to obtain accurate values of the mean fatigue limit stress until a number of cycles up to 1E7 cycles. Subsequently, the fatigue test results depend strongly on the stress step and are evaluated by the Dixon-Mood formula. The values of mean fatigue strength and standard deviation predicted by the staircase method are 282 MPa and 10.6MPa, respectively. Finally, the reliability of the design fatigue strength in some selected probability of failure is calculated. Results indicate that the fatigue strength determined from accelerated staircase test is consistent with conventional fatigue testing. Furthermore, the proposed method can be applied for the determination of fatigue strength and standard deviation for design optimisation of S34MnV steel.

scholarly journals CRACK RESISTANCE OF BABBIT B83

2017 ◽  
Vol 2017 (1) ◽  
pp. 91-102 ◽  
Author(s):  
Михаил Зернин ◽  
Mikhail Zernin
Keyword(s):  
Finite Element ◽  
Stress Intensity ◽  
Crack Resistance ◽  
Stress Intensity Factors ◽  
Cyclic Crack Resistance ◽  
Intensity Factors ◽  
Finite Element Procedure ◽  
Crack Resistance Test ◽  
Definition Of ◽  
Fracture Viscosity

Babbit 83 crack resistance test in accordance with SSR 25-506-85 was carried out. By finite element method there were defined values of stress intensity factors in flat samples with a grown crack. The fracture viscosity characteristics of babbit are obtained. On the basis of a macro-fractographic analysis of wear fractures of a babbit sample and a finite element procedure for the definition of values of stress intensity factors the cha-racteristics of cyclic crack resistance are obtained. It is shown that a final fracture is realized at 3 МПа , and a transition from an elastic stage to the stage elastoplastic development of a crack is realized at 2,0…2,8 МПа .

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