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heat tinting

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Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.mech.c0048131
EISBN: 978-1-62708-225-9
... Abstract The springs formed from 3.8 mm diam cold-drawn carbon steel wire failed to comply with load-test requirements. A split wire in the spring was revealed by investigation. A smooth heat-tinted longitudinal zone was observed in the fracture. It was concluded that the spring failed in the...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.modes.c0048757
EISBN: 978-1-62708-234-1
... subjecting the overheated tube to a flattening test that the tube no longer met ASTM B 337 specifications. Large grain size and numerous needlelike hydride particles were disclosed in the microstructure of the overheated tube. Heating to approximately 815 deg C was revealed by the presence of the flaky oxide...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001126
EISBN: 978-1-62708-214-3
... sometimes fury retained in the frame by the plastic adhesive backing on the back surface of the glass. The glass breakage was reportedly concentrated on the south, west and east faces of the buildings. The building specifications for the spandrel glass call for a 6.4 mm ( 1 4 in.) heat...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.process.c0047756
EISBN: 978-1-62708-235-8
... to fatigue cracking. Fatigue stresses acting in combination with additional heating and possible overtempering of the tube during torch debrazing and subsequent rebrazing may have contributed to failure. Reduction of the temperature to which the components of the joint were heated, either in torch...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.process.c0091048
EISBN: 978-1-62708-235-8
... suggested by the extent of the oxide or heat tint discoloration. The underside of the weld joint contained melt through. The crack surface after excision is shown in Fig. 1b . The fracture surface had a faceted appearance with significantly larger facets within the weld and HAZs. Grain growth is not...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001773
EISBN: 978-1-62708-241-9
... sample is shown in Fig. 6 , with the locations of several cracks noticed in the photograph. The crack locations were observed to coincide with the location of the heat affected zone (HAZ) of the weld used to attach Plate B to Plate A. Furthermore, a dark line indicative of heat tint, identifies the HAZ...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0001817
EISBN: 978-1-62708-180-1
... Abstract This article describes the characteristics of tubing of heat exchangers with respect to general corrosion, stress-corrosion cracking, selective leaching, and oxygen-cell attack, with examples. It illustrates the examination of failed parts of heat exchangers by using sample selection...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001305
EISBN: 978-1-62708-215-0
... Fig. 2 , two zones exhibited definite signs of heating. The entire hub fracture surface was tinted blue, indicating it reached temperatures of approximately 315 °C (600 °F). This heating occurred after the wheel fractured and was caused by the axle rotating relative to the wheel. The fracture surface...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001846
EISBN: 978-1-62708-241-9
... lubrication chromium steel circumferential wear marks peel pits heat tinting fatigue striations SEM imaging fatigue strength 42CrMo (chromium-molybdenum alloy steel) 38CrMoAl (chromium-molybdenum-aluminum alloy steel) References 1. Steel-iron parts-determination of nitrided...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.chem.c9001713
EISBN: 978-1-62708-220-4
... cracking were found during the visual inspection, with the exception of a small crack (several millimeters) located near the off-loading port, that is most likely a result of the damage done to the blender during the accident. No local regions of melting or heat tinting were found. These findings indicate...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.steel.c9001255
EISBN: 978-1-62708-232-7
... off neck. In the centre of the fracture is a darkly tinted excentric flaw ( Fig. 2 ). Such internal cracks occur when a cast or forged work piece is heated up too quickly and insufficiently thoroughly for the anneal. The thermal expansion of the outer zone puts the central core under tensile stress...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003556
EISBN: 978-1-62708-180-1
... probably <10% ( Ref 66 ). Most failures are associated with welds, because areas of joining tend to be inherently more susceptible to corrosive attack than the base material. Studies have shown that heat-tinted zones are especially vulnerable. These zones are created in a welding process where...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006788
EISBN: 978-1-62708-295-2
... Abstract This article focuses on the mechanisms of microbiologically influenced corrosion as a basis for discussion on the diagnosis, management, and prevention of biological corrosion failures in piping, tanks, heat exchangers, and cooling towers. It begins with an overview of the scope of...
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
... influence of microstructures on the failure of a material is discussed and examples of such work are given to illustrate the value of light microscopy. In addition, information on heat-treatment-related failures, fabrication-/machining-related failures, and service failures is provided, with examples...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.bldgs.c9001204
EISBN: 978-1-62708-219-8
... heat treated ( Fig. 8 ). The previously mentioned unfavorable fiber direction of these pieces can also be seen from the secondary banded structure. The weld seams consisted of austenitic steel. They were permeated with hot tears ( Fig. 9 ) as could be concluded already from the heat tinting of the...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c9001482
EISBN: 978-1-62708-229-7
... condition, heat-tinting at 300°C revealed them as shown in Figure 5 , which illustrates the copper-rich inclusions in the main fissure together with grain boundary penetration as indicated by the arrows. Fig. 5 (× 50). Some of the deposit was scraped from the bore surface of the first sample...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001754
EISBN: 978-1-62708-241-9
...-sections, most apparent on the bearing ball and the IR, the heat damage was localized and non-uniform. The bearing assembly did not experience elevated temperature operation as evidenced by the lack of heat tinting. It was also reported that lubrication was not an issue. The damage observed on the...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001799
EISBN: 978-1-62708-241-9
... ratchet marks were also observed on one edge, Fig. 5 . A small shear lip was also observed on one of the surfaces. The fractured surfaces were also smeared at some locations. High-temperature color bands were present on fractured surface. These bands were due to heat tinting probably resulting from...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001082
EISBN: 978-1-62708-214-3
... crack surface contained pits and heat tinting. Fig. 11 Photomacrograph of fracture faces from crack shown in Fig. 4 . 1.37×. Figure 12 shows a scanning electron microscope (SEM) cross section of one of the surface pit areas shown in Fig. 11 . Corrosion pits near the surface are visible...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0001813
EISBN: 978-1-62708-180-1
... (originally similar to the lower) has been deliberately distorted to expose the split interfaces. The fracture shows a smooth heat-tinted longitudinal zone, which was the original split, and a rougher bright-appearing longitudinal zone, which resulted from tearing during testing and examination. The course of...