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microstructural transformation

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Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.machtools.c9001574
EISBN: 978-1-62708-223-5
... deg F). Visual and binocular inspection at 64+ revealed presence of cracks and complete washout of coating in the working area of the failed punch. Comparison of metallographic cross sections of used and unused punches revealed a significant microstructural transformation in case of the used punch...
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
...Abstract Abstract This article provides an overview of the effects of various material- and process-related parameters on residual stress, distortion control, cracking, and microstructure/property relationships as they relate to various types of failure. It discusses phase transformations...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001834
EISBN: 978-1-62708-241-9
... wall thinning low-alloy carbon steel spheroidization SEM backscattered electron analysis microstructural transformation T12 (chromium-molybdenum low-alloy carbon steel) Introduction Examined Sample Results and Discussion Discussion Conclusion Acknowledgment References...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.modes.c0048289
EISBN: 978-1-62708-234-1
.... The microstructure near the rupture edge was revealed by metallographic examination to consist of ferrite and acicular martensite or bainite. The microstructure and the observed lack of cold work indicated a temperature above the transformation temperature of 727 deg C had been reached. Swelling of the tubes...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.steel.c9001159
EISBN: 978-1-62708-232-7
... pipe had become coarse-grained and acicular, and the microstructure of the welding seam had become predominantly martensitic as a result of the mixing of the weld metal with the fused pipe material. The chrome steel pipe had become partially transformed to martensite or bainite at the transition...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.usage.c0047343
EISBN: 978-1-62708-236-5
...) Ferritic matrix with transformation products. 300x. (c) Oxidation surrounding a thermal fatigue crack. 60x. All etched with nital The general microstructure of the housing was satisfactory. It consisted of spheroidal graphite in a ferritic matrix with a small amount of spheroidized pearlite ( Fig. 6...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001791
EISBN: 978-1-62708-241-9
... to high temperatures. The combined effect of pitting, incrustations, and phase transformations caused the pipe to rupture. boiler tube fracture corrosion pits salt incrustation carbon steel thermal fatigue striations dimples microstructural analysis plastic strain A192 (carbon steel) UNS...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.process.c9001685
EISBN: 978-1-62708-235-8
.... Quench-related failures whereby components that cracked either during or immediately after the heat treatment/quenching operation were sectioned for metallographic examination of the microstructure to examine the degree of phase transformation. Examination of premature tensile specimen failures...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.process.c0092148
EISBN: 978-1-62708-235-8
... caused unstable retained austenite in the failed cylinder to transform to martensite. The increase in volume resulted in sufficient size distortion to cause interference between the cylinder and the spool, seizing, and loss of flow control. The failed parts had been carburized in a process in which...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001043
EISBN: 978-1-62708-214-3
... failure, whereas the opposite side exhibited a planar-type fracture. Sections were removed from the eroded area and from the opposite lip for microscopic studies and chemical analysis. The eroded edges exhibited river bed ditching, indicative of thermal fatigue. Microstructural analysis showed massive...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001304
EISBN: 978-1-62708-215-0
... microscopic examination of the two weld beads revealed different etching responses: the internal bead showed a transformed microstructure, and the external bead showed an as-solidified microstructure. Microstructural analysis of the transformed weld metal microstructure (Internal bead) showed appreciable...
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
... to produce the desired microstructural transformation or to complete the desired diffusion process). If the austenitizing temperature is too high or if exposure is too long, excessive grain growth can lead to poor toughness or quench cracking. Subsequent quenching of the part leads to quench cracks at sharp...
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.a0006807
EISBN: 978-1-62708-329-4
..., leading to a synergistic effect. These include thermally activated microstructural changes or aging that occurs in metallic materials in the same temperature range where creep is a concern. This article is aimed at providing an overview of the damage mechanisms of concern, with a focus on creep...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001330
EISBN: 978-1-62708-215-0
... 580 °C (1075 °F). A spheroidized microstructure with graphite nodules indicated that tube 1 was operating at a temperature significantly above its oxidation limit and below its lower transformation temperature of 727 °C (1340 °F) for an extended period of time. Transformation products...
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
... through the seam. As can be seen from Figs. 4 , 5 , 6 , 7 , 8 , the structure of the welding seam is composed of a number of different microstructures of different carbon content and at different transformation stages. Fig. 1 Views of the tube specimens. 1 ×. Mid-portions. Fig. 2...
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.a0006826
EISBN: 978-1-62708-329-4
... of the workpiece material. Undesired metallurgical transformation involves microstructural changes caused by temperature and high contact pressures. Included are phase transformations, recrystallization, alloy depletion, decarburization, and molten and recast, resolidified, or redeposited material, as in EDM...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001837
EISBN: 978-1-62708-241-9
... 8. Bhadeshia H.K.D.H. , Honeycomb R. : Steels: Microstructure and Properties , 3rd edn. , pp. 296 – 297 . Elsevier ( 2006 ) 9. Andrews K.W. : Empirical formulae for the calculation of some transformation temperatures . J. Iron Steel Inst . 203 , 721 – 727 ( 1965...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.modes.c9001671
EISBN: 978-1-62708-234-1
... of a material is sensitive to temperature, and tends to decrease with increasing temperature. The adiabatic shear process is a result of deformation generated heat that cannot escape a localized region quickly enough to prevent a microstructural change which results in a transformation band. This transformation...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006792
EISBN: 978-1-62708-295-2
.... Microstructural Transformation by XRD Analysis , Lubr. Eng. , Vol 58 ( No. 10 ), 2002 , p 30 – 40 43. Ishida M. and Abe N. , Experimental Study on Rolling Contact Fatigue from the Aspect of Residual Stress , Wear , Vol 191 ( No. 1 ), 1996 , p 65 – 71 10.1016/0043-1648(95)06712-4...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001821
EISBN: 978-1-62708-241-9
... of BLEVEs is not necessarily associated with phase transformations in the steel of the propane tanks. The microstructural and hardness variations cited in previous studies [ 1 , 3 ] are suspected to be similar to those observed in the vicinity of the surface weld in the Truth or Consequences tank...