Constant-Load-Amplitude Fatigue Crack Growth Testing of Cast Aluminum Alloys A201-T7 and A357-T6

1985 ◽  
Author(s):  
J. D. Tirpak
Keyword(s):  
Fatigue Crack ◽  
Aluminum Alloys ◽  
Fatigue Crack Growth ◽  
Crack Growth ◽  
Constant Load ◽  
Cast Aluminum ◽  
Load Amplitude ◽  
Cast Aluminum Alloys ◽  
Constant Load Amplitude ◽  
Fatigue Crack Growth Testing

scholarly journals Effects of roughness-induced crack closure on fatigue crack growth in AC4CH cast aluminum alloys.

1995 ◽  
Vol 45 (4) ◽  
pp. 204-208 ◽  
Author(s):  
Shinji KUMAI ◽  
Akinori SEKIKAWA ◽  
Jianqun HU ◽  
Yakichi HIGO ◽  
Shigetomo NUNOMURA
Keyword(s):  
Fatigue Crack ◽  
Aluminum Alloys ◽  
Fatigue Crack Growth ◽  
Crack Growth ◽  
Crack Closure ◽  
Cast Aluminum ◽  
Cast Aluminum Alloys

Fatigue Crack Growth of Duplex Stainless Steel Castings at 4 K

1985 ◽  
Vol 107 (2) ◽  
pp. 161-165 ◽  
Author(s):  
P. T. Purtscher ◽  
Y. W. Cheng ◽  
P. N. Li
Keyword(s):  
Stainless Steel ◽  
Fatigue Crack ◽  
Fatigue Crack Growth ◽  
Duplex Stainless Steel ◽  
Crack Growth ◽  
Growth Rates ◽  
Constant Load ◽  
Steel Castings ◽  
Constant Load Amplitude ◽  
Crack Growth Rates

Constant-load-amplitude stage II fatigue crack growth rates at 4 K were measured for duplex stainless steel castings. The results show that at a ΔK of 60 MPa•m1/2, da/dN = 7.6 × 10−4 mm/cycle for an alloy with 1 percent ferrite. For an alloy with 8 percent ferrite, da/dN is 35 percent, and for an alloy with 29 percent ferrite, da/dN is 260 percent greater than for the 1 percent ferrite alloy. However, the exponent in the Paris equation does not change appreciably (less than 18 percent) as the ferrite content changes from 1 to 29 percent.

scholarly journals Analysis of the Deceleration Methods of Fatigue Crack Growth Rates under Mode I Loading Type in Pearlitic Rail Steel

Metals ◽  
2021 ◽  
Vol 11 (4) ◽  
pp. 584
Author(s):  
Grzegorz Lesiuk ◽  
Hryhoriy Nykyforchyn ◽  
Olha Zvirko ◽  
Rafał Mech ◽  
Bartosz Babiarczuk ◽  
...  
Keyword(s):  
Growth Rate ◽  
Fatigue Crack ◽  
Crack Growth Rate ◽  
Fatigue Crack Growth ◽  
Crack Growth ◽  
Fatigue Crack Growth Rate ◽  
Rail Steel ◽  
Constant Load ◽  
Raw Material ◽  
Constant Load Amplitude

The paper presents a comparison of the results of the fatigue crack growth rate for raw rail steel, steel reinforced with composite material—CFRP—and also in the case of counteracting crack growth using the stop-hole technique, as well as with an application of an “anti-crack growth fluid”. All specimens were tested using constant load amplitude methods with a maximum loading of Fmax = 8 kN and stress ratio R = smin/smax = 0.1 in order to analyze the efficiency of different strategies of fatigue crack growth rate deceleration. It has been shown that the fatigue crack grows fastest in the case of the raw material and slowest in the case of “anti-crack growth fluid” application. Additionally, the study on fatigue fracture surfaces using light and scanning electron (SEM) microscopy to analyze the crack growth mechanism was carried out. As a result of fluid activity, the fatigue crack closure occurred and significantly decreased crack driving force and finally resulted in fatigue crack growth decrease.

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