Correlation Between Fatigue Crack Growth Rate and Fatigue Striation Spacing in AISI 9310 (AMS 6265) Steel

2009 ◽  
pp. 202-202-20 ◽  
Author(s):  
JJ Au ◽  
JS Ke
Keyword(s):  
Growth Rate ◽  
Fatigue Crack ◽  
Crack Growth Rate ◽  
Fatigue Crack Growth ◽  
Crack Growth ◽  
Fatigue Crack Growth Rate ◽  
Fatigue Striation ◽  
Striation Spacing

The Effects of Hold Period on the Fatigue Crack Growth Rate of 2 1/4 Cr-1Mo Steel at Elevated Temperatures

1983 ◽  
Vol 105 (4) ◽  
pp. 280-285 ◽  
Author(s):  
K. D. Challenger ◽  
P. G. Vining
Keyword(s):  
Growth Rate ◽  
Fatigue Crack ◽  
Crack Growth Rate ◽  
Fatigue Crack Growth ◽  
Crack Growth ◽  
Fatigue Crack Growth Rate ◽  
Strain Range ◽  
Fatigue Striation ◽  
Hold Period ◽  
Striation Spacing

The effects of various loading wave forms on the fatigue crack growth rate of 2 1/4 Cr-1Mo steel at 482 and 538°C tested in air have been determined. Scanning electron fractography was used to measure the fatigue striation spacing on the fracture surface of strain controlled push-pull fatigue tests. The fatigue striation spacing was then used as a monitor of the fatigue crack growth rate in these specimens once a fatigue crack had been initiated. Constant strain hold periods were introduced during each cycle at various points of the hysteresis loop. Both increasing temperature and strain range increased the fatigue crack growth rate for continuously cycled tests as expected. However, when a hold period was introduced, the crack growth rate was dominated by the time that preceded each strain reversal; temperature and strain range effects became secondary to hold time. The effect of hold periods for the conditions examined is primarily crack tip oxidation rather than creep crack growth during the hold period.

Influence of reactor water of nominal parameters on fatigue crack growth rate in 15Kh2NMFA steel

1985 ◽  
Vol 21 (2) ◽  
pp. 130-133
Author(s):  
V. I. Pokhmurskii ◽  
A. S. Zubchenko ◽  
A. A. Popov ◽  
I. P. Gnyp ◽  
V. M. Timonin ◽  
...  
Keyword(s):  
Growth Rate ◽  
Fatigue Crack ◽  
Crack Growth Rate ◽  
Fatigue Crack Growth ◽  
Crack Growth ◽  
Fatigue Crack Growth Rate ◽  
Reactor Water ◽  
15Kh2nmfa Steel

Effect of Hardness and Tensile Mean Stress on Fatigue Crack Growth in Beryllium Copper

1969 ◽  
Vol 11 (3) ◽  
pp. 343-349 ◽  
Author(s):  
L. P. Pook
Keyword(s):  
Growth Rate ◽  
Fatigue Crack ◽  
Crack Growth Rate ◽  
Fatigue Crack Growth ◽  
Residual Stresses ◽  
Crack Growth ◽  
Fatigue Crack Growth Rate ◽  
Mean Stress ◽  
Growth Data ◽  
Beryllium Copper

Some fatigue crack growth data have been obtained for age-hardened beryllium copper. The fatigue crack growth rate was found to be very dependent on the hardness and tensile mean stress. This dependence is believed to be associated with the intense residual stresses surrounding Preston-Guinier zones.

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