1-20 of 579 Search Results for

microstructural analysis

Follow your search
Access your saved searches in your account

Would you like to receive an alert when new items match your search?
Close Modal
Sort by
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2010
DOI: 10.31399/asm.tb.omfrc.t53030211
EISBN: 978-1-62708-349-2
... section. Phase contrast, 40× objective Fig. 12.9 Transmitted-light microscopy of the natural fiber composite ultrathin section. Hoffman modulation contrast, 40× objective Abstract Microstructural analysis of the composite matrix is necessary to understand the performance of the part...
Image
Published: 01 December 2000
Fig. 5.64 Typical microstructure of experimental gears. Microstructure analysis: the microstructure consists of ferrite and pearlite. There is no evidence of banding. Section location: gear hub. Process: 100×, etched 3% nital More
Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2005
DOI: 10.31399/asm.tb.faesmch.t51270141
EISBN: 978-1-62708-301-0
...-defined chevron marks along the fracture surface that end in a shear lip on the convex side. Further examination using a SEM shows that the failure was due to overload. Based on these observations and the results of tensile testing and microstructural analysis, investigators concluded that a sudden impact...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2005
DOI: 10.31399/asm.tb.faesmch.t51270191
EISBN: 978-1-62708-301-0
... Abstract This report describes the failure of a gas turbine in a combined-cycle power plant and the examination and tests that were conducted to determine the cause. Based on microstructural analysis, hardness measurements, and tensile tests, the failure was attributed to inadequate clearances...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2005
DOI: 10.31399/asm.tb.faesmch.t51270165
EISBN: 978-1-62708-301-0
... and progressed circumferentially outward. Based on these observations and the results of SEM fractography and microstructural analysis, the fatigue cracking can be traced to insufficient fillet radius at the transition zone. crack initiation fatigue failure pressure impulse testing SEM fractography...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2005
DOI: 10.31399/asm.tb.faesmch.t51270133
EISBN: 978-1-62708-301-0
... Abstract A second-stage compressor blade in an aircraft engine fractured after 21 h of service. The remaining portion of the blade was removed and examined as were several adjacent blades. Based on the results of SEM fractography, microstructural analysis, and hardness testing, the blade failed...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2005
DOI: 10.31399/asm.tb.faesmch.t51270031
EISBN: 978-1-62708-301-0
... Abstract This chapter discusses some of the more advanced methods and procedures used in failure analysis, including in-service material sampling, in situ microstructure analysis, and a form of punch testing that can determine the fracture toughness of any material from a tiny specimen...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2015
DOI: 10.31399/asm.tb.spsp2.t54410001
EISBN: 978-1-62708-265-5
... International® All rights reserved asminternational.org Introduction Purpose of Text, Microstructure and Analysis, Steel Definitions, and Specifications Purpose of This Book THE PURPOSE OF THIS BOOK is to describe the physical metallurgy, i.e., the processing-s­tructure-p­ roperty relationships, of steels...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2005
DOI: 10.31399/asm.tb.faesmch.t51270067
EISBN: 978-1-62708-301-0
... measurements. fatigue fracture fractography microstructural analysis turbine blades Summary A low-pressure turbine rotor blade failed in service, causing extensive damage to the engine. The blade failed by stress rupture followed by fatigue due to high operating temperature. Background...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2005
DOI: 10.31399/asm.tb.faesmch.t51270087
EISBN: 978-1-62708-301-0
... images of the microstructure and fracture surfaces and explains what some of the details reveal about the failure. fatigue crack metallography microstructural analysis SEM fractography turbine blades Summary A blade from the last turbine stage of an aircraft engine failed in service...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2005
DOI: 10.31399/asm.tb.faesmch.t51270126
EISBN: 978-1-62708-301-0
... microstructural analysis visual examination Summary A four-engine aircraft made a test flight after a number of rectifications and ground runs. After becoming airborne, a fire warning came on for one of the engines. Even after a three-engine landing, the fire warning continued. On strip examination...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2005
DOI: 10.31399/asm.tb.faesmch.t51270130
EISBN: 978-1-62708-301-0
.... The bolts were removed and analyzed to determine the mode and cause of failure. Based on the results of macroscopy, scanning electron fractography, metallographic examination, and chemical analysis, the failures were caused by stress corrosion cracking, and in one case, overtightening. microstructural...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2005
DOI: 10.31399/asm.tb.faesmch.t51270095
EISBN: 978-1-62708-301-0
... to overheating, possibly as a result of misalignment compounded by insufficient lubrication and high speeds. aircraft engine bearings high-temperature wear microstructural analysis visual examination Summary In an aircraft engine, two center support ball bearings failed. In one, the inner ring...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 July 1997
DOI: 10.31399/asm.tb.wip.t65930039
EISBN: 978-1-62708-359-1
... characterization of a sectioned weld, including features such as number of passes; weld bead size, shape, and homogeneity; and the orientation of beads in a multipass weld. Macroscopic characterization is followed by microstructural analysis, including microsegregation, grain size and structure, the phase makeup...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2005
DOI: 10.31399/asm.tb.faesmch.t51270124
EISBN: 978-1-62708-301-0
... that a considerable amount of rubbing occurred after the shaft broke. SEM fractography revealed deformation marks and elongated dimples, typical of shear overloads, along with other details. Based on their analysis, investigators concluded that the cardan shaft failed under torsional overload. They also cited a need...
Image
Published: 01 September 2008
Fig. 17 Examples of failures in an 8%Cr-0.8%C tool steel, caused by an incorrect heat treating procedure. (a) Punches and (b) their microstructures. (c) Cutting blade and (d) the microstructure observed in its failure analysis. The primary cause of failure is low-temperature tempering and high More
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2018
DOI: 10.31399/asm.tb.fibtca.t52430149
EISBN: 978-1-62708-253-2
... crystal structure followed by hematite and magnetite layers. Chemical analysis confirmed the MOC of the tube as SA 213 T91 steel. The microstructure was tempered martensite, with normal tensile and hardness values. However, the thickness of the internal scale, which was in the range of 160 µm...
Image
Published: 01 August 2018
Fig. 17.22 Schematic microstructural evolution of a gray cast iron during solidification superimposed on a thermal analysis curve. Some undercooling below the eutectic temperature is needed for nucleation to start. Eutectic solidification happens essentially at constant temperature More
Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2002
DOI: 10.31399/asm.tb.mgppis.t60400149
EISBN: 978-1-62708-258-7
... it employs light as the source of illumination of the specimen. These microscopes are commonly called “optical” microscopes, but in this book the authors identify the microscope by the type of illumination used. The first stage in any metallographic analysis involves the observation of the microstructure...
Image
Published: 01 September 2008
Fig. 38 Examples of undesirable microstructures encountered on the surface of nitrided tools. For both cases, the core microstructures are correct, indicating proper hardening and tempering procedures. (a) Surface and (b) core microstructure of a nitrided forging tool, showing More