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structural flaw

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Series: ASM Technical Books
Publisher: ASM International
Published: 01 September 2008
DOI: 10.31399/asm.tb.fahtsc.t51130241
EISBN: 978-1-62708-284-6
... Abstract This chapter discusses the various factors influencing the evaluation of fatigue fracture of nitrided layers. It begins by describing the problems of enhancing the fatigue resistance of machine components. The significance and detailed assessment of the effect of a structural flaw...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 September 2005
DOI: 10.31399/asm.tb.gmpm.t51250293
EISBN: 978-1-62708-345-4
... for that section. This offset-contact pattern is typical for helical, spiral bevel, and hypoid gears. Lines on tooth faces are lines of contact. Abstract This chapter summarizes the various kinds of gear wear and failure and how gear life in service is estimated and discusses the kinds of flaws...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 April 2013
DOI: 10.31399/asm.tb.imub.t53720321
EISBN: 978-1-62708-305-8
... system. It makes use of several devices, such as visual, audio, and electromagnetic, for the detection of flaws and of variations in composition, hardness, and grain structure. A wide range of selectivity is provided for each device, permitting acceptance or rejection at various specification levels...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2005
DOI: 10.31399/asm.tb.faesmch.t51270019
EISBN: 978-1-62708-301-0
... and interference microscopes. Borescopes are very handy for examining surface flaws in inaccessible areas of structures. Liquid Penetrant Testing In this method, a liquid of low surface tension is allowed to penetrate into surface flaws and a visible indication is developed. It detects only discontinuities...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2012
DOI: 10.31399/asm.tb.lmub.t53550511
EISBN: 978-1-62708-307-2
... fracture toughness, and considerable scatter in strength properties—all manifestations of a brittle material. These characteristics dictate the need for consistent materials, flaw-detection methods, and the appropriate design methodology to ensure component reliability. In considering the use of structural...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 July 1997
DOI: 10.31399/asm.tb.wip.t65930085
EISBN: 978-1-62708-359-1
... destructive proof tests, are that a 100% inspection can be performed at manufacture and that monitoring of the structure or component can continue while it is in service. The principal disadvantage of NDE is that the measurements obtained are only indirectly related to the presence and severity of the flaws...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 April 2013
DOI: 10.31399/asm.tb.imub.t53720001
EISBN: 978-1-62708-305-8
... the quality or characteristics of a material, part, or assembly, without permanently altering the subject or its properties. All NDT or NDI methods are used to find internal anomalies or flaws in a structure without degrading its properties or impairing its serviceability. The term flaw is a general term...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 July 1997
DOI: 10.31399/asm.tb.wip.t65930113
EISBN: 978-1-62708-359-1
... conditions could be loss in the functionality of the structure/component due to increase in compliance of the load-bearing member, or failure of the remaining ligament material ahead of the growing fatigue crack by unstable fracture or plastic collapse. The critical flaw dimension, a c , at the onset...
Image
Published: 01 April 2013
Fig. 18 Coil assembly used for the simultaneous detection of flaws and of variation in composition, structure, and hardness in steel bars. Dimensions in inches. Source: Ref 1 More
Series: ASM Technical Books
Publisher: ASM International
Published: 01 July 1997
DOI: 10.31399/asm.tb.wip.t65930163
EISBN: 978-1-62708-359-1
... high-temperature creep plastic collapse weld discontinuities IT IS GENERALLY ACCEPTED THAT all welded structures enter service containing flaws that can range from volumetric discontinuities, such as porosity or slag inclusions, to planar defects, such as a lack of side-wall fusion or hydrogen...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 30 November 2013
DOI: 10.31399/asm.tb.uhcf3.t53630257
EISBN: 978-1-62708-270-9
... as a fracture toughness parameter. Most structures contain defects of various types, as shown in Table 1 . Cracks and cracklike flaws often are present in sizes below the limit of sensitivity of nondestructive inspection tests. It is not practical or economical to fabricate defect-free structures, so the only...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 April 2013
DOI: 10.31399/asm.tb.imub.t53720365
EISBN: 978-1-62708-305-8
... Abstract In forgings of both ferrous and nonferrous metals, the flaws that most often occur are caused by conditions that exist in the ingot, by subsequent hot working of the ingot or the billet, and by hot or cold working during forging. The inspection methods most commonly used to detect...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2010
DOI: 10.31399/asm.tb.scm.t52870333
EISBN: 978-1-62708-314-0
... Abstract This chapter discusses the use of nondestructive inspection methods, including visual, ultrasonic, radiographic, and thermographic techniques, and the types of flaws and damages they can reveal in composite parts and assemblies. It describes the basic principles behind each method...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2004
DOI: 10.31399/asm.tb.tt2.t51060163
EISBN: 978-1-62708-355-3
... on advanced monolithic ceramics and CMCs. These include effects of flaw type and location on tensile tests, separation of flaw populations, design strength and scale effects, and lifetime predictions and environmental effects. The chapter discusses the advantages, problems, and complications of four basic...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 April 2013
DOI: 10.31399/asm.tb.imub.t53720267
EISBN: 978-1-62708-305-8
... Abstract Ultrasonic inspection is a nondestructive method in which beams of high frequency acoustic energy are introduced into a material to detect surface and subsurface flaws, to measure the thickness of the material, and to measure the distance to a flaw. This chapter begins with an overview...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2011
DOI: 10.31399/asm.tb.mnm2.t53060149
EISBN: 978-1-62708-261-7
... eye or with microscopes) to reveal the constitution and underlying structure of metals and alloys. Metallography is a basic tool that has helped transform metallurgy from an art to a science. Metallography also gives metallurgists an important tool in evaluating the quality and condition of metal...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 June 1983
DOI: 10.31399/asm.tb.mlt.t62860269
EISBN: 978-1-62708-348-5
... and location, the fracture criterion (plane strain or plane stress), and the load used in critical-flaw-size calculations. Material and structural technologies must be integrated into the design of safe, functional, and economical structures. The design should incorporate the results of the structural...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 July 1997
DOI: 10.31399/asm.tb.wip.t65930057
EISBN: 978-1-62708-359-1
... Abstract Discontinuities are interruptions in the desirable physical structure of a weld. This article describes the types of weld discontinuities that are characteristic of the principal welding processes. Discontinuities covered are metallurgical discontinuities, discontinuities associated...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2015
DOI: 10.31399/asm.tb.piht2.t55050175
EISBN: 978-1-62708-311-9
... stock. Figure 9.4 shows 10 different types of flaws that may be found in rolled bars. Porosity is the result of trapped gaseous bubbles in the solidifying metal, causing porous structure in the interior of the ingot. On rolling, these structures are elongated and interspersed throughout...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 1995
DOI: 10.31399/asm.tb.sch6.t68200083
EISBN: 978-1-62708-354-6
... Abstract This chapter provides an overview of factors that must be considered in the design of structural components for satisfactory service performance in terms of mechanical behavior of steel castings. The chapter discusses designing against yielding, excessive deflection, and creep...