A critical review of corrosion-fatigue test methods

2002 ◽  
Vol 99 (5) ◽  
pp. 411-422
Author(s):  
H.-P. Lieurade
Keyword(s):  
Fatigue Test ◽  
Corrosion Fatigue ◽  
Critical Review ◽  
Test Methods

Comparison of fatigue test methods on asphalt mastic

2016 ◽  
pp. 1185-1191
Author(s):  
Chiara Riccardi ◽  
Augusto Cannone Falchetto ◽  
Michael P. Wistuba
Keyword(s):  
Fatigue Test ◽  
Test Methods ◽  
Asphalt Mastic

scholarly journals Expectation method for fatigue limit of used rail on railway by surface roughness and effect of difference of various fatigue test methods

2020 ◽  
Vol 86 (888) ◽  
pp. 20-00147-20-00147
Author(s):  
Mitsuru HOSODA ◽  
Jun MIZUTANI ◽  
Mikiihiro IWASAKI ◽  
Ryuichi YAMAMOTO
Keyword(s):  
Surface Roughness ◽  
Fatigue Limit ◽  
Fatigue Test ◽  
Test Methods

Acoustic Emission Study of Corrosion Fatigue and Fatigue for API 5L X70 Gas Pipeline Steel

2011 ◽  
Vol 138-139 ◽  
pp. 635-639
Author(s):  
Z.H. Hanafi ◽  
Nordin Jamaludin ◽  
Shahrum Abdullah ◽  
M.F.M. Yusof ◽  
M.S.M. Zain
Keyword(s):  
Acoustic Emission ◽  
Fatigue Test ◽  
Corrosion Fatigue ◽  
Pipeline Steel ◽  
Petroleum Industry ◽  
Fatigue Behaviour ◽  
Pressure Vessels ◽  
Uniform Corrosion ◽  
Smooth Specimen ◽  
Steel Pipeline

Acoustic emission is a very important test among non-destructive tests, and it has been applied for the detection of failures in various types of equipment in the petroleum industry, such as pressure vessels, tanks and pipelines. In this study, the effect of pre-existing uniform corrosion on the corrosion fatigue specimen and smooth specimen on fatigue behaviour of API 5L X70 steel pipeline in long life range was investigated by using acoustic emission in fatigue test. The presence of pre-existing uniform corrosion specimen, produces by 4 month immersion in sulphuric acid, H2SO4 (concentration 0.2 ml H2SO4 in 5000 ml deionized water ). Fully reverse (R = -1) constant amplitude fatigue test were done in corrosion fatigue and smooth specimen in different stress amplitudes. It was found that, effect of pre-existing uniform corrosion significantly reduced the fatigue life of the steel pipeline. The correlations of accumulative AE counts for corrosion fatigue higher than fatigue test because of the mechanisms of possible AE sources due to corrosion.

scholarly journals The behaviour of a single crystal of aluminium under alternating torsional stresses while immersed in a slow stream of tap water

1932 ◽  
Vol 135 (827) ◽  
pp. 392-411 ◽  
Keyword(s):  
Single Crystal ◽  
Fatigue Test ◽  
Corrosion Fatigue ◽  
Tap Water ◽  
Present Report ◽  
Cycle Number ◽  
Corrosion Fatigue Crack ◽  
Mechanical Methods ◽  
Wide Range ◽  
Number Of Cycles

The characteristics of the deformation and fracture of metals under repeated cycles of stress, generally described as “fatigue phenomena,” have received very considerable attention, both experimental and theoretical. Usually, consideration has been devoted exclusively to conditions in which the metal subjected to fatigue has its free surface exposed to the ordinary atmosphere. In many cases in actual practice, however, metals are subjected to fatigue action while surrounded by a fluid—either gaseous or liquid—which is of a corrosive nature and the endurance or “life” of the metal is controlled by the simultaneous conjoint action of the applied stresses and the corrosive agent. To such conditions the term “corrosion-fatigue” has been applied. Attention was first directed to this aspect of fatigue phenomena in 1917 by Haigh, who demonstrated experimentally that, in general, fatigue stresses and corrosive influences may be mutually accelerative, producing more destructive effects than either influence when acting separately, or when the stressing is applied subsequent to the corrosion stage. The subject then appeared to escape further attention for a period of about nine years, after which the results of the first of a series of important researches were published; in this connection reference should be made to the work of Lehmann, McAdam, Speller, McCorkle and Mumma, Binnie, Fuller, Haigh and Jones, etc. From the researches of these investigators, and particularly from those of McAdam, a very large amount of data is now available regarding the corrosion-fatigue resistance of a wide range of metals and alloys, and the separate effects of such variables as frequency of stress cycle, number of cycles, corrosion time, applied range of stress, etc., also of corrosion inhibitors and accelerators. No attention has apparently been given hitherto to the changes in microstructure occurring during a corrosion-fatigue test and, as a result, no information existed on such fundamental points as (i) the general course of a corrosion-fatigue crack; whether intercrystalline or transcrystalline; (ii) the actual point of initiation of the crack; whether it is situated at a crystal boundary, or on the site of previous slip bands, or at local corrosion pits bearing no distinct relation to these special positions. In planning a research with these general objects in view it was decided to make experiments, under corrosion-fatigue conditions, on ( a ) a single crystal, ( b ) a specimen consisting of two large crystals with the separating boundary, and ( c ) a specimen consisting of the usual finely-divided aggregate of crystals. By using single crystals and large crystal specimens and employing X-ray, microscopical and mechanical methods, it was hoped to correlate corrosion-fatigue phenomena with the fine structure. The present report describes the observations made on what is believed to be the first corrosion-fatigue test on a single crystal.

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