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heat treatment

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Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.mech.c0047991
EISBN: 978-1-62708-225-9
... austenitized. Displacement of metal on the outer raceway was revealed by elongation of grain structure. It was concluded that the failure of the raceway surface was due to incomplete austenitization caused by the improper heat treatment during flame hardening process. Antennas Austenitizing Bearing...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.modes.c0048791
EISBN: 978-1-62708-234-1
... crosses had been subjected to an induction-heating stress improvement-induction heating the outer wall of the pipe to 550 to 600 °C (1020 to 1110 °F) maximum for a maximum of 12 min while the inside is cooled with water. This treatment leaves a residual tensile stress on the outer surface and a residual...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.modes.c9001557
EISBN: 978-1-62708-234-1
... Abstract A number of machined end frame steel forgings made of Cr-Si-Mn alloy showed tiny cracks during magnetic particle inspection after heat treatment. The cracks were mostly confined to base edges and fillet radius. No significant abnormality was observed in chemical composition...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.chem.c0048840
EISBN: 978-1-62708-220-4
... records that the ring had been removed for hydrotest and welded without any postweld heat treatment. The final cause of failure was concluded to be cracking that developed during the installation of the new shroud ring. Stress-relief heat treatments were recommended to be performed to reduce residual...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.aero.c0047072
EISBN: 978-1-62708-217-4
... by fatigue that initiated at the notch created by the intersection of the faying surfaces of the clip and shell with the spot weld nuggets. The 6061 aluminum alloy shell and stiffener were in the annealed (O) temper rather than T6, as specified. Recommendations included heat treating the shell and stiffener...
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Published: 01 January 2002
Fig. 13(a) AISI S5 tool steel hammer head that cracked during heat treatment. The fracture was caused by quench cracking that was promoted by the decarburized surface ( Fig. 13(b) ) and deep stamp mark (arrows). Actual size More
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Published: 01 January 2002
Fig. 17 AISI M2 roughing tool that cracked just after heat treatment. (a) Cracks accentuated with magnetic particles. (b) Microstructural examination revealed a badly overaustenitized condition with a heavy grain-boundary carbide film, coarse plate martensite, and unstable retained austenite More
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Published: 01 January 2002
Fig. 22 AISI S7 punch that had a low surface hardness after heat treatment and was given a second carburizing treatment, then rehardened. Cracking was observed after this retreatment (the cracks have been accentuated with magnetic particles). Coarse circumferential machining marks were present More
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Published: 01 January 2002
Fig. 34 Coil spring made from AISI H12 tool steel that cracked after heat treatment. A tight seam that was not removed by centerless grinding before heat treatment opened during hardening (arrows). 0.3× More
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Published: 01 January 2002
Fig. 28 Large welded tube that cracked upon postweld stress-relief heat treatment ( example 12 ) More
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Published: 01 January 2002
Fig. 27 Plot of the change in the compressive residual stress due to heat treatment More
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Published: 01 January 2002
Fig. 28 X-ray diffraction residual stress versus heat treatment temperature for various iron alloys. Specimens were held at temperature for 1 h and furnace cooled. More
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Published: 01 January 2002
Fig. 29 Effect of heat treatment temperature on (a) hardness (HRC) and (b) XRD peak integral breadth. More
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Published: 01 June 2019
Fig. 12 Structure after heat treatment ( 1 2 hr. at 1050° C/water). Etching treatment: V2A-etching solution. 200 × More
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Published: 01 June 2019
Fig. 3 Structure of the steel after the heat treatment (tempered martensite), etched with Nital. 200 × More
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Published: 01 June 2019
Fig. 2 Structure after heat-treatment, etchant: Picral. 100× More
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Published: 01 June 2019
Fig. 2 Fracture of test specimens after heat treatment. approx. 1 × More
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Published: 01 June 2019
Fig. 2 Fracture after heat treatment 930°C/W., 600° C/A. C. 1 × More
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Published: 01 June 2019
Fig. 1 Large welded tube that cracked upon postweld stress-relief heat treatment More
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Published: 15 January 2021
Fig. 34 (a) Protrusions on machined surface of 2024 aluminum after heat treatment. Original magnification: 16×. (b) Section of 2024 aluminum showing voids but no overheating. Keller’s etch. (c) Forged steel flange showing large blister after normalizing. (d) Section through blister. Nital etch More