scholarly journals Recognizing heat‐treated chert: A comparison between infrared spectroscopy and fracture surface analysis

Archaeometry ◽  
2021 ◽  
Author(s):  
Julie Bachellerie ◽  
Patrick Schmidt
Keyword(s):  
Infrared Spectroscopy ◽  
Fracture Surface ◽  
Surface Analysis ◽  
Heat Treated ◽  
Fracture Surface Analysis

Fracture Surface Analysis of Optical Fibers

Fiber Optics ◽  
1979 ◽  
pp. 187-208 ◽  
Author(s):  
J. J. Mecholsky ◽  
S. W. Freiman ◽  
S. M. Morey
Keyword(s):  
Fracture Surface ◽  
Surface Analysis ◽  
Optical Fibers ◽  
Fracture Surface Analysis

Piecing Failure Analysis of Drill Pipe Upset

2011 ◽  
Vol 314-316 ◽  
pp. 1210-1213
Author(s):  
Fang Po Li ◽  
Yong Gang Liu ◽  
Wang Yong
Keyword(s):  
Mechanical Properties ◽  
Fracture Surface ◽  
Failure Analysis ◽  
Surface Analysis ◽  
Drill Pipe ◽  
Fatigue Property ◽  
Forging Process ◽  
Result Show ◽  
Fracture Surface Analysis ◽  
Mechanical Properties Testing

The failure cause of Φ127mm G105 IEU drill pipe upset was investigated through mechanical properties testing, optical morphologies and fracture surface analysis. The result show that drill pipe upset’s failure reason is the elephant hide and decarburization layer in its out-surface caused by improper upset treatment in forging process. Elephant hide and decarburization layer existing in drill pipe upset changed seriously reduced its strength and fatigue property. Under the effect of alternating stresses, the crack first initiated from the deepest position of elephant hide and developed quickly. In the end, it leaded the drill pipe to early piecing failure.

Influence of Different Surface Treatments on Fatigue Life of 7050 Al Alloy

2019 ◽  
Vol 944 ◽  
pp. 142-148 ◽  
Author(s):  
Nan Li ◽  
Hai Tao Li ◽  
Jing Yi Zhou ◽  
Hong Tao Liu ◽  
Chang Kui Liu ◽  
...  
Keyword(s):  
Residual Stress ◽  
Fatigue Life ◽  
Fracture Surface ◽  
Surface Morphology ◽  
Surface Analysis ◽  
Shot Peening ◽  
Surface Treatments ◽  
Al Alloy ◽  
Stress Measurements ◽  
Fracture Surface Analysis

The fatigue life of 7050 Al alloy samples after different surface treatments, i.e., as-machined, anodizing, shot peening, and shot peening followed by anodizing, had been tested. The shot peening treatment specimens presented the longest average fatigue life. The fatigue life of anodizing treatment specimens decreased by 69.3% and 78.8% at 215 MPa and 260 MPa stress levels than as-machined ones. Introducing the shot peening treatment before anodizing can increase the fatigue life by 220% / 296.9% at 215 MPa/260 Mpa than that only treated by anodizing. The effect of the surface treatments on the fatigue life were studied by performing surface morphology investigation, residual stress measurements and fracture surface analysis.

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