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hot ductility-related defects

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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
... D 111 Fold markings over rather large areas of the casting Surface folds, gas runs D 112 Surface shows a network of jagged folds or wrinkles (ductile iron) Cope defect, elephant skin, laps D 113 Wavy fold markings without discontinuities; edges of folds at same level, casting...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003507
EISBN: 978-1-62708-180-1
..., internal bursts or chevron cracks, cracks on free surfaces, cracks on die-contacted surfaces Metal-flow-related problems: for example, end grain and poor surface performance; inhomogeneous grain size; shear bands and locally weakened structures; cold shuts, folds, and laps; flow-through defects...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003508
EISBN: 978-1-62708-180-1
... molds. It presents the international classification of common casting defects in a tabular form. austenitic steels cast aluminum alloys cast iron casting casting defects casting design castings centrifugal casting corrosion-resistant castings discontinuities ductile iron gravity die...
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
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.a0006835
EISBN: 978-1-62708-329-4
... are covered. discontinuities hot forming ingot casting metalworking defects nonferrous forging steel forging wrought metal products Introduction to Failures Related to Hot Forming Processes Imperfections from the Ingot Imperfections in Wrought Forms Steel Forging Defects Defects...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003509
EISBN: 978-1-62708-180-1
... not sacrifice weldment reliability or if it is a defect (which, by definition here, is a condition that must be removed or corrected). A discontinuity is not necessarily a defect until it either affects the fitness-for-service of a weld or is defined as such by an acceptance/rejection criteria related...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001289
EISBN: 978-1-62708-215-0
... was made. Subsurface cracks were found to be zigzag and discontinuous as well as intergranular in nature. A mixed mode of fracture involving ductile and brittle flat facets was observed. Micropores and rod-shaped manganese sulfide inclusions were also noted. The material had a hydrogen content of 22 ppm...
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.a0006808
EISBN: 978-1-62708-329-4
... describes some of the welding discontinuities and flaws characterized by nondestructive examinations. It focuses on nondestructive inspection methods used in the welding industry. The sources of weld discontinuities and defects as they relate to service failures or rejection in new construction inspection...
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
... Reference 1. “Standard Method for Conducting Drop-Weight Test to Determine Nil-Ductility Transition Temperature of Ferritic Steels,” E 208, Annual Book of ASTM Standards , Vol 03.01 , ASTM, Philadelphia, 1984 , p 346 – 365 Selected References Selected References • Failures Related...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001839
EISBN: 978-1-62708-241-9
... recorded during the period of dispatch and at the time of customer complaint, respectively. The pronounced loss of tensile ductility is clearly evident in the defective coil samples, which can be discerned from the abrupt drop in overall elongation values from 50% during the time of coil dispatch to about...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.mech.c0046205
EISBN: 978-1-62708-225-9
.... Evidence found supports the conclusion that the shaft failed as the result of stress in the sharp fillets and rough surfaces at the root of the splines. Cold weather failure occurred sooner than in hot weather because ductile-to-brittle transition temperature of the 1040 steel shaft was too high...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006778
EISBN: 978-1-62708-295-2
... • Little distortion evident • Intergranular or transgranular • May relate to notches at surface or brittle phases internally • Progressive zone: usually transgranular with little apparent distortion • Overload zone: may be either ductile or brittle • Microstructural change typical of overheating...
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
... that for carburized cases. The nitrogen transfer is blocked by any contamination on the part surface. Thorough surface cleaning prior to nitriding is mandatory to prevent nonuniform nitriding, flaking layers, or other surface defects. Other related nitriding problems may include: Failing to provide...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003543
EISBN: 978-1-62708-180-1
..., but were acceptable according to the applicable specifications. No gross defects or evidence of brittle behavior were identified. Conclusions The analytical results indicated that the fasteners failed via ductile overload in the absence of gross defects or embrittlement. It was subsequently...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001845
EISBN: 978-1-62708-241-9
... during the hot forging process and evolved due to the overlap defect. The microstructure of the failed splint consisted of highly deformed a-grains. No evidence of microstructural flaws or discontinuities that could be related to the damage was revealed. FEA results revealed that the interface...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.steel.c0089617
EISBN: 978-1-62708-232-7
...Abstract Abstract A forged 4130 steel cylindrical permanent mold, used for centrifugal casting of gray- and ductile-iron pipe, was examined after pulling of the pipe became increasingly difficult. In operation, the mold rotated at a predetermined speed in a centrifugal casting machine while...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0001820
EISBN: 978-1-62708-180-1
.... The failure characteristics will be presented in the section “Causes of Service Failures” in this article because this is the leading cause of service failures. Material defects may be laminations, laps, seams, holes, hot tears, and so on. A few failures have resulted from foreign material being rolled...
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.a0006824
EISBN: 978-1-62708-329-4
.... Note the greater extent of material loss at the trailing edges, where low-angle ductile erosion is prevalent. In the hot section of the gas turbine, solid-particle erosion can act in concert with high-temperature oxidation to cause material loss. At high angles of incidence, the particulate can...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001848
EISBN: 978-1-62708-241-9
... of failure mechanisms of H13 die on relation to the forging process—a case study of brass gas valves . Eng. Fail. Anal . 17 , 403 – 415 ( 2010 ) 10.1016/j.engfailanal.2009.08.015 6. Njeh F. , Kchaou M. , Elleuch R. , Hallouani F. : Failure modes of die used for hot forging...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001031
EISBN: 978-1-62708-214-3
...Abstract Abstract Pinhole defects were found in a main combustion chamber made from NARloy-Z after an unexpectedly short time in service. Analysis indicated that the throat section of the liner had been exposed to very severe environmental conditions of high temperature and high oxygen content...