Specimen size effects on gigacycle fatigue properties of high-strength steel under ultrasonic fatigue testing

2008 ◽  
Vol 58 (11) ◽  
pp. 1014-1017 ◽  
Author(s):  
Y. Furuya
Keyword(s):  
Size Effects ◽  
High Strength Steel ◽  
Fatigue Testing ◽  
High Strength ◽  
Specimen Size ◽  
Fatigue Properties ◽  
Ultrasonic Fatigue

scholarly journals Fatigue Process Evaluation of Ultrasonic Fatigue Testing in High Strength Steel Analyzed by Acoustic Emission and Non-Linear Ultrasonic

2010 ◽  
Vol 51 (8) ◽  
pp. 1404-1408 ◽  
Author(s):  
Mitsuharu Shiwa ◽  
Yoshiyuki Furuya ◽  
Hisashi Yamawaki ◽  
Kaita Ito ◽  
Manabu Enoki
Keyword(s):  
Acoustic Emission ◽  
Process Evaluation ◽  
High Strength Steel ◽  
Fatigue Testing ◽  
High Strength ◽  
Fatigue Process ◽  
Non Linear ◽  
Ultrasonic Fatigue

An Investigation of the Fatigue Property of Ultra-High Strength Mould Steel at 130 Hz and 20 kHz

2012 ◽  
Vol 239-240 ◽  
pp. 96-99 ◽  
Author(s):  
Wen Jie Peng ◽  
Li Yu ◽  
Hui Cai Long ◽  
Huan Xue ◽  
Lan Xiang Kuang ◽  
...  
Keyword(s):  
Size Effects ◽  
Fatigue Testing ◽  
Fatigue Property ◽  
High Strength ◽  
Fatigue Tests ◽  
Frequency Effect ◽  
Test Results ◽  
Fatigue Specimen ◽  
Ultrasonic Fatigue

In this paper, the fatigue property of ultra-high strength mould steel is investigated. The fatigue specimen is designed particularly due to the ultra-high strength. Fatigue tests are conduced using ultrasonic and conventional fatigue testing machines respectively. The same geometry and size of the ultrasonic fatigue specimens and conventional fatigue specimens are adopted to overcome the size effects. The test results are compared to investigate the frequency effect.

EVALUATION OF ULTRASONIC FATIGUE TESTING PROCESS OF HIGH STRENGTH STEEL BY NON-LINEAR ULTRASONIC ANALYSIS

2009 ◽  
Author(s):  
M. Shiwa ◽  
Y. Furaya ◽  
H. Yamawaki ◽  
K. Ito ◽  
M. Enoki ◽  
...  
Keyword(s):  
High Strength Steel ◽  
Fatigue Testing ◽  
High Strength ◽  
Non Linear ◽  
Ultrasonic Fatigue ◽  
Ultrasonic Analysis

scholarly journals Experimental Evidence of Specimen-Size Effects on EN-AW6082 Aluminum Alloy in VHCF Regime

2021 ◽  
Vol 11 (9) ◽  
pp. 4272
Author(s):  
Stefano Invernizzi ◽  
Francesco Montagnoli ◽  
Alberto Carpinteri
Keyword(s):  
Aluminium Alloy ◽  
Cross Section ◽  
Fatigue Testing ◽  
Testing Machine ◽  
Experimental Tests ◽  
Theoretical Explanation ◽  
Specimen Size ◽  
Section Surface ◽  
Middle Cross Section ◽  
Ultrasonic Fatigue

The present paper investigates the influence of the specimen size of EN-AW6082 wrought aluminium alloy subjected to very high cycle fatigue (VHCF) tests. The hourglass specimens were tested under fully reversed loading condition, up to 109 cycles, by means of the ultrasonic fatigue testing machine developed by Italsigma® (Italy). Three specimens groups were considered, with a diameter in the middle cross-section ranging from 3 mm up to 12 mm. The stress field in the specimens was determined numerically and by strain gauge measurements in correspondence of the cross-section surface. The dispersion of experimental results has been accounted for, and data are reported in P-S-N diagrams. The decrease in fatigue resistance with increasing specimen size is evident. Theoretical explanation for the observed specimen-size effect is provided, based on Fractal Geometry concepts, allowing to obtain scale independent P-S*-N curves. The fatigue life expectation in the VHCF regime of the EN-AW6082 aluminium alloy full-scale components is rather overestimated if it is assessed only from standard small specimens of 3 mm in diameter. Experimental tests carried out on larger specimens, and a proper extrapolation, are required to assure safe structural design.

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