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microstructural analysis

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Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2012
DOI: 10.31399/asm.tb.ffub.t53610549
EISBN: 978-1-62708-303-4
... high magnifications attainable, typically 5000 to 10,000×. In addition, SEMs are often equipped with microanalytical capabilities, for example, energy-dispersive x-ray spectroscopes. Chemical analysis can be helpful in confirming the chemistry of microstructural features that may be confused with...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2006
DOI: 10.31399/asm.tb.cw.t51820001
EISBN: 978-1-62708-339-3
... materials. The discussion covers the factors influencing corrosion of weldments, microstructural features of weld microstructures, various forms of weld corrosion, and welding practice to minimize corrosion. microstructure weld corrosion welding weldments CORROSION FAILURES OF WELDS occur in...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2006
DOI: 10.31399/asm.tb.cw.t51820013
EISBN: 978-1-62708-339-3
... Abstract Carbon and low-alloy steels are the most frequently welded metallic materials, and much of the welding metallurgy research has focused on this class of materials. Key metallurgical factors of interest include an understanding of the solidification of welds, microstructure of the weld...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2006
DOI: 10.31399/asm.tb.cw.t51820169
EISBN: 978-1-62708-339-3
... • “Dissimilar Weld Failure Analysis and Development Program,” Vol 1–4 , Report CS-4252 , Electric Power Research Institute , Palo Alto, CA • Schaeffler A. L. , Constitution Diagram for Stainless Steel Weld Metal , Met Prog. , Vol 56 ( No. 11 ), 1949 , p 680 – 688 Dissimilar metal...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2006
DOI: 10.31399/asm.tb.cw.t51820125
EISBN: 978-1-62708-339-3
... include chemical composition and microstructure of the alloy, and external factors include electrolyte composition, temperature, and electrode potential. In general, the use of nickel-base alloys in corrosive applications is based on their chemical composition. For example, a nickel-base alloy such as...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2006
DOI: 10.31399/asm.tb.cw.t51820177
EISBN: 978-1-62708-339-3
... of Carbon Steel Pipe Welds in a Kamyr Continuous Digester Equalizer Line , Handbook of Case Histories in Failure Analysis , Vol 1 , ASM International , 1992 , p 168 – 170 10.31399/asm.fach.v01.c9001061 55. Garner A , Corrosion of Weldments in Pulp Bleach Plants , Welding Journal...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2006
DOI: 10.31399/asm.tb.cw.t51820043
EISBN: 978-1-62708-339-3
... Microbiologically Influenced Corrosion Failure Analysis,” Paper 381, presented at Corrosion ’87 , National Association of Corrosion Engineers , 1987 16. Zhigang C. , Gumpel P. , and Kaesser M. , Microbiologically Influenced Corrosion of Weld on Stainless Steel 304L , Chin. J. Mech. Eng...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2006
DOI: 10.31399/asm.tb.cw.t51820203
EISBN: 978-1-62708-339-3
... analysis can be complex. Such analysis is usually directed at distinguishing the different forms of corrosion, quantifying the noise signals, and processing the vast number of accumulated data points into a summarized format. Data processing approaches can involve both time-domain and frequency spectral...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2006
DOI: 10.31399/asm.tb.cw.t51820143
EISBN: 978-1-62708-339-3
.... , Localized Corrosion and Stress Corrosion Cracking Resistance of Friction Stir Welded Aluminum Alloy 5454 , Corrosion , Vol 55 ( No. 2 ), 1999 , p 139 – 150 10.5006/1.3283974 21. Li Z.X. , Arbegast W.J. , Hartley P.J. , and Meletis E.I. , Microstructure Characterization and...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2006
DOI: 10.31399/asm.tb.cw.t51820077
EISBN: 978-1-62708-339-3
... of Weldments, Corrosion , Vol 13, 9th ed., Metals Handbook , ASM International, 1987, p 344–368 In addition, Example 2 was adapted from H. Krafft, Alloy 430 Ferritic Stainless Steels Welds Fail due to Stress-Corrosion Cracking in Heat-Recovery Steam Generator , Practical Failure Analysis...
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 August 2005
DOI: 10.31399/asm.tb.horfi.t51180151
EISBN: 978-1-62708-256-3
... analysis sample collection sample examination report writing failure mode analysis mechanical test nondestructive test microstructural examination fractographs micrographs The objective of all manufacturing is to produce an economical, reliable product whether it is an automobile, an airplane...
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 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 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 of...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2005
DOI: 10.31399/asm.tb.faesmch.t51270130
EISBN: 978-1-62708-301-0
... 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.t51270067
EISBN: 978-1-62708-301-0
... measurements. fatigue fracture fractography microstructural analysis turbine blades 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. In an...
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 In an aircraft engine, two center support ball bearings failed. In one, the...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2005
DOI: 10.31399/asm.tb.faesmch.t51270025
EISBN: 978-1-62708-301-0
... and electron microscopy. It presents a number of images recorded using these methods and explains what they reveal about the mode of fracture and the state of the component prior to failure. fractography microscopic examination macroscopy IN FAILURE ANALYSIS, examination is done at...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2000
DOI: 10.31399/asm.tb.cub.t66910475
EISBN: 978-1-62708-250-1
... Abstract This chapter discusses the techniques applicable to the diagnosis of corrosion failures, including visual and microscopic examination of corroded surfaces and microstructure; chemical analysis of the metal, corrosion products, and bulk environment; nondestructive evaluation methods...