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quench cracking

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Series: ASM Handbook
Volume: 4B
Publisher: ASM International
Published: 30 September 2014
DOI: 10.31399/asm.hb.v04b.a0005967
EISBN: 978-1-62708-166-5
... continuous cooling transformation diagram crystal structure decarburization dimensional change grain size grinding heat treatment machining mechanical cracking microcracks microsegregation nonmetallic inclusions phase transformation process design quench distortion quenchants quenching...
Series: ASM Handbook
Volume: 12
Publisher: ASM International
Published: 01 January 1987
DOI: 10.31399/asm.hb.v12.a0000613
EISBN: 978-1-62708-181-8
...-overload fractures, impact fractures, microstructure, quench cracking, brittle-in-service failure, hydrogen embrittlement, stress-corrosion cracking, and grain-boundary cracking of tool steel components. These components include diesel engine injector plungers, rivet-heading tools, circular saw blades, and...
Series: ASM Handbook
Volume: 12
Publisher: ASM International
Published: 01 January 1987
DOI: 10.31399/asm.hb.v12.a0000604
EISBN: 978-1-62708-181-8
... observed even at this low temperature. Primary fracture mode is brittle quasi-cleavage. SEM, 830× (R.C. Voigt and B. Pourlaidian, University of Kansas) Microcracking in a pearlitic malleable iron (ASTM A220, grade 50005). Heat treatment: graphitize anneal, then quench and temper to 223 HB. Samples...
Series: ASM Handbook
Volume: 4B
Publisher: ASM International
Published: 30 September 2014
DOI: 10.31399/asm.hb.v04b.a0005934
EISBN: 978-1-62708-166-5
... cracking or even through hardening, the total cooling process must be considered. The H -values reveal nothing about thermal and transformational stress generation from the quenching process. Cooling curve analysis has traditionally been considered to be one of the best methods to assess quench...
Series: ASM Handbook
Volume: 4E
Publisher: ASM International
Published: 01 June 2016
DOI: 10.31399/asm.hb.v04e.a0006272
EISBN: 978-1-62708-169-6
...-corrosion cracking are other characteristics that generally improve by maximum rapidity of quenching. Some of the alloys used in artificially aged tempers, in particular, the copper-free 7 xxx alloys, are exceptions to this rule. The effect of quench rate on mechanical properties may also depend on the...
Series: ASM Handbook
Volume: 4B
Publisher: ASM International
Published: 30 September 2014
DOI: 10.31399/asm.hb.v04b.a0005950
EISBN: 978-1-62708-166-5
... up to that step. For example, severe distortion and quench cracking are generally irredeemable and the losses due to heat treatment include the manufacturing costs prior to the heat treatment. Moreover, heat treatment necessitates relatively large amounts of energy, longer processing times, and...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006785
EISBN: 978-1-62708-295-2
... Abstract Stress-corrosion cracking (SCC) is a form of corrosion and produces wastage in that the stress-corrosion cracks penetrate the cross-sectional thickness of a component over time and deteriorate its mechanical strength. Although there are factors common among the different forms of...
Series: ASM Handbook
Volume: 23
Publisher: ASM International
Published: 01 June 2012
DOI: 10.31399/asm.hb.v23.a0005654
EISBN: 978-1-62708-198-6
... Abstract This article describes some of the mechanical/ electrochemical phenomena related to the in vivo degradation of metals used for biomedical applications. It discusses the properties and failure of these materials as they relate to stress-corrosion cracking (SCC) and corrosion fatigue (CF...
Series: ASM Handbook
Volume: 4E
Publisher: ASM International
Published: 01 June 2016
DOI: 10.31399/asm.hb.v04e.a0006260
EISBN: 978-1-62708-169-6
... quenching because it provides for more uniform heat transfer around parts. If the water is not well agitated, then highly variable heat transfer can occur. This is especially true of nonsymmetrical parts, where large differences in heat transfer can result in distortion or cracking. Very large differences...
Series: ASM Handbook
Volume: 4E
Publisher: ASM International
Published: 01 June 2016
DOI: 10.31399/asm.hb.v04e.a0006286
EISBN: 978-1-62708-169-6
... residual stress will cause distortion during the quenching or welding and subsequent machining processes. Due to the distortion, extra material usually is added to ensure dimensional compliance, or, in the worst case, if the distortion is too severe, cracks may occur and the part must be scrapped. The...
Series: ASM Handbook
Volume: 4E
Publisher: ASM International
Published: 01 June 2016
DOI: 10.31399/asm.hb.v04e.a0006252
EISBN: 978-1-62708-169-6
... twist or bend noticed after quenching, snagging of a band saw blade, expensive rework as a result of machining distortion, or even a severely cracked component emerging from a quench tank. Precipitation-hardened aluminum alloys have been the major enabling material technology of aviation since their...
Series: ASM Handbook
Volume: 4B
Publisher: ASM International
Published: 30 September 2014
DOI: 10.31399/asm.hb.v04b.a0005935
EISBN: 978-1-62708-166-5
... quenching) due to surface oxidation and oxide cracking (scale) at the surface ( Fig. 8 , points 6) are identified. In sound emission, there are also short time peaks of high intensity with frequencies up to 12 kHz in water quenching as a result of exceeded cooling rate ( Fig. 8a and 8b , area 7). The...
Series: ASM Handbook
Volume: 4B
Publisher: ASM International
Published: 30 September 2014
DOI: 10.31399/asm.hb.v04b.a0005929
EISBN: 978-1-62708-166-5
... Abstract This article provides information on the salt baths used for a variety of heat treatments, including heating, quenching, interrupted quenching (austempering and martempering), case hardening, and tempering. It describes two general types of salt bath systems for steel hardening: the...
Series: ASM Handbook
Volume: 4B
Publisher: ASM International
Published: 30 September 2014
DOI: 10.31399/asm.hb.v04b.a0005944
EISBN: 978-1-62708-166-5
... Abstract The use of gases or molten salts as the quenchant for steel parts is commonly limited to the quenching of high-alloy steel or the carbonizing quenching of low-alloy steel. This article reviews the quenching process of steels with molten metals (quenchant) such as molten lead, molten...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003103
EISBN: 978-1-62708-199-3
... larger sections and the use of an oil rather than a water quench to minimize distortion and avoid quench cracking. When the standard alloy steels are considered, it is found that, for practical purposes, all compositions develop the same tensile properties when quenched to martensite and tempered to...
Series: ASM Handbook
Volume: 13B
Publisher: ASM International
Published: 01 January 2005
DOI: 10.31399/asm.hb.v13b.a0003836
EISBN: 978-1-62708-183-2
..., including hydrogen embrittlement and stress-corrosion cracking. hydrogen embrittlement stress-corrosion cracking liquid phase quenching transition metal-metal binary alloys transition metal-metalloid alloys amorphous simple metal-transition metal-rare earth metal alloys AMORPHOUS, or glassy...
Series: ASM Handbook
Volume: 12
Publisher: ASM International
Published: 01 January 1987
DOI: 10.31399/asm.hb.v12.a0000608
EISBN: 978-1-62708-181-8
... in these views is typical of those produced by high-cycle fatigue in combined bending and torsion. Fig. 345 : 2×. Fig. 346 : 10× Fig. 347 Fatigue fracture along prior-austenite grain boundaries in as-quenched AISI 4140. Note striations (arrows) at places where the crack met grain-boundary...
Series: ASM Handbook
Volume: 4B
Publisher: ASM International
Published: 30 September 2014
DOI: 10.31399/asm.hb.v04b.a0005932
EISBN: 978-1-62708-166-5
... may form at the liquid-gas interface of the vapor blanket in polymer or other solutions Deposits that form or changes that occur (for example, cracking of oil) in the liquid itself, thus affecting its viscosity Permanent loss of the volatile constituents of a quenching liquid due to low boiling...
Series: ASM Handbook
Volume: 4B
Publisher: ASM International
Published: 30 September 2014
DOI: 10.31399/asm.hb.v04b.a0005933
EISBN: 978-1-62708-166-5
... intolerable distortion, warpage, and quench cracks ( Ref 6 ). On the other hand, convective cooling in oil is less intensive due to relatively high viscosity and lower heat capacity. Different quenching oils tend to show a prolonged vapor blanket stage, a short nucleate boiling stage with a much lower cooling...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003204
EISBN: 978-1-62708-199-3
... cracking of certain copper-free Al-Zn-Mg alloys, however, is improved by slow quenching. Most frequently, parts are quenched by immersion in cold water or, in continuous heat treating of sheet, plate, or extrusions in primary fabricating mills, by progressive flooding, or high-velocity spraying with cold...