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Published: 01 December 2019
Fig. 12 Detailed view of Fig. 10 . Area adjacent to that shown in Fig. 11 and at twice as high magnification. Evidence of remolten eutectic phase on grain boundary. Feather-like structure that could be contrasted by etching on the grain boundary in center of the image is not dendrite since More
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Published: 01 June 2019
Fig. 6 Optical micrograph of the outer surface of the ring section in Fig. 5 showing thermal fatigue cracks. More
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Published: 01 June 2019
Fig. 7 Scanning electron micrograph of outer surface at zone 5 in Fig. 3 showing extensive cracking by thermal fatigue. More
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Published: 01 June 2019
Fig. 8 Scanning electron micrograph of main crack surface (zone 1 in Fig. 3 ) showing patches of fatigue striations separated by shear steps or tear ridges. More
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Published: 01 June 2019
Fig. 3 Wedge-type cracks seen in Fig. 2 , shown in more detail. Nital etch. More
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Published: 01 June 2019
Fig. 6 Showing section through tube seen in Fig. 5 More
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Published: 01 June 2019
Fig. 2 Microstructures of the failed reheater tube in Fig. 1(b) . (a) Section through the failure lip showing a complete spheroidization of the carbide phase in ferrite. (b) Section in the same plane as the failure, but 180° around the circumference of the tube. Structure is nearly normal More
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Published: 01 June 2019
Fig. 3 Metallographic cross section through fracture surface shown in Fig. 2 . Lack of fissures and voids indicates cracking was not caused by a creep damage mechanism. 15× More
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Published: 01 June 2019
Fig. 5 Gamma prime structures from blade shown in Fig. 4 as viewed in the SEM. Note presence of coarse (primary) gamma prime particles in blade root midwall (a), which are lacking in the denuded zone of the trailing edge (b). Etch: electrolytic, 20% sulfuric acid in methanol. More
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Published: 01 June 2019
Fig. 12 Ultrasound for the crack shown in Fig. 11 More
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Published: 01 June 2019
Fig. 2 Inside of shaded area of Fig. 1 after removal and liquid penetrant inspection to show cracks. More
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Published: 01 June 2019
Fig. 3 Tip of crack in section of plate shown in Fig. 2 . More
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Published: 01 June 2019
Fig. 4 Portion of Fig. 3 at higher magnification showing intergranular nature of cracks (× 320). More
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Published: 01 June 2019
Fig. 4 Inner Surface of Mating Portion of Top Air Hole in Fig. 3 , Showing Cracks. Magnification 2.5 × More
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