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Surface treatment related failures

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Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2018
DOI: 10.31399/asm.tb.fibtca.t52430343
EISBN: 978-1-62708-253-2
...-Related Failures Boiler feedwater consists of returns from condensate, known as condensate water, and make-up water. Feedwater, before being fed to the boiler, is subjected to chemical treatment for two reasons. The first is to prevent the buildup of solid deposits (i.e., scaling over the ID surface...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2018
DOI: 10.31399/asm.tb.fibtca.t52430147
EISBN: 978-1-62708-253-2
... problems Rapid start-ups Excessive load swing Excessive heat inputs Failures due to poor water chemistry control Water-treatment-related failures Conventional treatment All volatile treatment (AVT) Lack of quality control or improper quality control: Failures attributed...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 September 2008
DOI: 10.31399/asm.tb.fahtsc.t51130311
EISBN: 978-1-62708-284-6
... Abstract This chapter focuses on the failure aspects of tool steels. The discussion covers the classification, chemical composition, main characteristics, and several failures of tool steels and their relation to heat treatment. The tool steels covered are hot work, cold work, plastic mold...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 1998
DOI: 10.31399/asm.tb.ts5.t65900325
EISBN: 978-1-62708-358-4
... Abstract This chapter presents an overview of some of the major causes of tool and die failures. The chapter describes fracture and fracture toughness of tool steels, and the influence of factors such as steel quality and primary processing, mechanical design, heat treatment, grinding...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2012
DOI: 10.31399/asm.tb.ffub.t53610585
EISBN: 978-1-62708-303-4
... geometries, or assembly stresses from configurations that contain unwanted interference. Inappropriate surface treatments can result in failures, such as the use of cadmium plating on an A286 superalloy fastener subjected to service temperatures above 315 °C (600 °F), because the melting temperature...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 September 2008
DOI: 10.31399/asm.tb.fahtsc.t51130001
EISBN: 978-1-62708-284-6
... processing of steels. This is followed by sections on various aspects of heat treatment design and heat treating practices for minimizing distortion. Influence of design, steel grade, and condition is then illustrated in the examples of failures due to heat treatment. A procedure is analyzed to improve...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 September 2008
DOI: 10.31399/asm.tb.fahtsc.t51130087
EISBN: 978-1-62708-284-6
... something wrong, but where other contributing factors made it difficult or impossible for the heat treater to meet the specification. heat treatment steel parts deformation fracture wear corrosion conformance THE TERM mechanism of failure means different things to different people. One...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 September 2008
DOI: 10.31399/asm.tb.fahtsc.t51130285
EISBN: 978-1-62708-284-6
... shown to be an important failure related to heat treatment. In this chapter, the causes and cases associated with problems originated by tempering are reviewed. However, to provide background on this phenomenon, a brief description of the martensite reactions and the steel heat treatment of tempering...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 September 2008
DOI: 10.31399/asm.tb.fahtsc.t51130395
EISBN: 978-1-62708-284-6
... for densification and dimensional correction, followed by finishing operations. The finishing operations include machining, case and through hardening, steam treatment, and so on (Ref 1) . This chapter reviews failure aspects of structural ferrous PM parts, which form the bulk of the PM industry. Focus...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 September 2008
DOI: 10.31399/asm.tb.fahtsc.t51130111
EISBN: 978-1-62708-284-6
.... Fracture surfaces must remain untouched so that high-magnification images can accurately determine the failure mode. The sample must be removed carefully. Important evidence can be destroyed by over-heating or by allowing adjacent fracture surfaces to fret or rub together during sectioning. The ideal...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 1999
DOI: 10.31399/asm.tb.cmp.t66770135
EISBN: 978-1-62708-337-9
... of constant-load impacts to failure (low cycle) ( Ref 12 ). Fig. 6.27 Relation between carburizing time and bending strength. Source: Ref 32 Effect of Case Carbon on Impact Fatigue Impact-fatigue resistance benefits from a lower surface carbon content. Brugger for example, found...
Series: ASM Technical Books
Publisher: ASM International
Published: 30 November 2013
DOI: 10.31399/asm.tb.uhcf3.t53630001
EISBN: 978-1-62708-270-9
... Examination and analysis of metallographic specimens Determination of failure mechanism Chemical analysis (bulk, local, surface corrosion products, deposits or coatings, and microprobe analysis) Analysis of fracture mechanics (see Chapter 15, “Fracture Mechanics,” in this book) Testing under...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2017
DOI: 10.31399/asm.tb.sccmpe2.t55090349
EISBN: 978-1-62708-266-2
.... This process exacerbates intergranular SCC initiation. Maximum tensile surface residual stresses caused by surface treatments of type 304 stainless steel Table 15.1 Maximum tensile surface residual stresses caused by surface treatments of type 304 stainless steel Sample Surface preparation...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2018
DOI: 10.31399/asm.tb.fibtca.t52430351
EISBN: 978-1-62708-253-2
... to the poor quality of the welding; the joining of internal defects on account of flue gas (hot) corrosion on the OD surface and operational and start-up–shutdown cyclic stresses finally led to leakage. Failures Related to Cleaning Buildup of scales on the water side of a boiler is an inevitable...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2000
DOI: 10.31399/asm.tb.cub.t66910475
EISBN: 978-1-62708-250-1
... constitutes failure. Localized attack, for example, by pitting, can penetrate the walls of vessels, piping, valves, and related equipment to cause leakage that constitutes failure. Even relatively shallow localized attack can provide stress concentrations or can generate hydrogen on the metal surface...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2018
DOI: 10.31399/asm.tb.fibtca.9781627082532
EISBN: 978-1-62708-253-2
Series: ASM Technical Books
Publisher: ASM International
Published: 01 September 2008
DOI: 10.31399/asm.tb.fahtsc.t51130151
EISBN: 978-1-62708-284-6
... Abstract This chapter describes cast steel features that may be identified or attributed to component failure during heat treatment or subsequent processing or service, namely porosity (generated by the presence of gas as well as by shrinkage pores), decarburization, cold joint, and inclusions...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2018
DOI: 10.31399/asm.tb.fibtca.t52430379
EISBN: 978-1-62708-253-2
... chemicals or additives to make it a boiler-quality feedwater. The main reasons behind many boiler tube failures include the accumulation of scales, corrosion, and pitting on the inner surface of the tubes as a result of contaminated water entering the boiler, and carryover of impurities. Impurities...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 September 2008
DOI: 10.31399/asm.tb.fahtsc.t51130177
EISBN: 978-1-62708-284-6
... due to service-related causes, such as misalignment, poor lubrication, and overloading, which constitute the greatest source of all gear failures, as shown in Table 2 ( Ref 7 ). Heat treatment was the second most often cited cause for failure. However, it is often difficult to detect the root cause...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2005
DOI: 10.31399/asm.tb.faesmch.t51270019
EISBN: 978-1-62708-301-0
... such as temperature, pressure, rotation, etc. Environment Materials of construction Specifications and codes Concessions given in the components Strength parameters Fabrication processes Thermomechanical treatments Surface treatments Inspection techniques and records Maintenance records...