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eutectoid transformation

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Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.process.c9001207
EISBN: 978-1-62708-235-8
..., The area in Fig. 5 is already carburized considerably but the steel is still hypo-eutectoid as indicated by the precipitation of ferrite at the austenitic grainboundaries. Further transformation has taken place in the pearlite stage and partly into the intermediate and martensitic stages. The area shown...
Image
Published: 01 January 2002
Fig. 9 Effect of tensile stress on pearlite transformation starting and ending times. Isothermal transformation at 673°C (1243 °F), eutectoid steel. The t D and t F times are transformation starting and ending times, respectively. More
Image
Published: 30 August 2021
Fig. 18 Cooling paths for (a) martempering, (b) austempering, and (c) time quenching superimposed on the isothermal transformation curve for eutectoid steel More
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.process.c9001184
EISBN: 978-1-62708-235-8
... and was adapted to the latter by diffusion only at the periphery of the inclusion. In another section of a hardened piece of the same chromium steel, the steel in this case had a structure of martensite with hypereutectic carbide, while the inclusions consisted of a very fine laminated eutectoid of the lower...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.aero.c9001145
EISBN: 978-1-62708-217-4
... combustion gases. As seen in Fig. 19 , the steel to the right of the fracture is heavily tempered and etches more readily than the unaffected steel at the extreme right. The temperatures involved were close to the A 1 (eutectoid) transformation temperature of the steel. The A 1 is shifted locally...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003510
EISBN: 978-1-62708-180-1
... austenite is converted to martensite is approximately 0.014 in./in. for eutectoid compositions. This illustrates the effect of carbon structure and steel transformation on residual stresses and distortion leading to dimensional changes. Fig. 5 Carbon content versus lattice parameters of (retained...
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.a0006816
EISBN: 978-1-62708-329-4
... Abstract This article introduces some of the general sources of heat treating problems with particular emphasis on problems caused by the actual heat treating process and the significant thermal and transformation stresses within a heat treated part. It addresses the design and material factors...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.petrol.c9001592
EISBN: 978-1-62708-228-0
... microstructure to transform to bands of very hard martensite and bands of ferrite/pearlite. The presence of the hard martensite bands combined with MnS inclusions to promote the initiation of fatigue cracks and lead to a decreased resistance to crack propagation. Fig. 7 Bands in the microstructure...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003532
EISBN: 978-1-62708-180-1
... that was aged at 816 °C (1500 °F) to transform the delta ferrite to sigma phase. In this case, the impact strength at room temperature was only 7% of that of an as-welded sample containing austenite and delta ferrite. Note that the fracture path is microscopically flatter and consists of numerous connected...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003540
EISBN: 978-1-62708-180-1
... In addition, another complex mechanism is quench cracking, which almost always occurs intergranularly. Quench cracking may be aggravated by the various mechanisms of grain-boundary weakening and grain size, but it also is heavily influenced by volumetric expansion during transformation hardening...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006765
EISBN: 978-1-62708-295-2
... not wear at the proper rate, dull abrasives rub against the region being cut, generating heat and altering the existing true microstructure. If this heat becomes excessive, it can lead to grain or particle coarsening, softening or phase transformations, and, in extreme cases, burning or melting. Different...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006777
EISBN: 978-1-62708-295-2
... to eutectoid divorcement in low-carbon steels Grain-boundary hypereutecoid cementite in carburized or hypereutectoid steels Iron nitride grain-boundary films in nitrided steels Temper embrittlement in heat treated steels due to segregation of phosphorus, antimony, arsenic, or tin Embrittlement...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003538
EISBN: 978-1-62708-180-1
... amounts of plastic deformation. Two types of particles may be involved: inclusions and second phases. In poly-phase alloys, the presence of eutectic or eutectoid structures also affects crack nucleation and propagation. In cast alloys, the presence of both microscale interdendritic porosity...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003520
EISBN: 978-1-62708-180-1
... to melt the bronze alloy and transform the approximately eutectoidal carbon steel of the drive axle to austenite. Fig. 3 Broken axles from two different Seaboard Coast Line locomotives that failed due to overheated friction-bearing failures. The pictures show both axles that were used to learn...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006775
EISBN: 978-1-62708-295-2
... site of pore (incipient crack) formation is at second phases and/or inclusions in the matrix after varying amounts of plastic deformation. Two types of particles can be involved: inclusions and second phases. In polyphase alloys, the presence of eutectic or eutectoid structures also affects crack...
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.9781627083294
EISBN: 978-1-62708-329-4
Book Chapter

Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003548
EISBN: 978-1-62708-180-1
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006783
EISBN: 978-1-62708-295-2
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.a0006831
EISBN: 978-1-62708-329-4