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ferritic structural alloys

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Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.conag.c9001198
EISBN: 978-1-62708-221-1
... of the cast iron should therefore be held in the hypoeutectic alloy range. It remained to be investigated what effect stress relief annealing had on the ferrite content of the structure. For this purpose a number of untreated caps were annealed for 2h at 550, 575, 600, 650 and 750° C, respectively, after...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.process.c9001184
EISBN: 978-1-62708-235-8
... Abstract Examples of metallic inclusions in steels of various types are presented. The structure of an inclusion in an annealed Fe-1C-1.5Cr steel consisted of ferrite with lamellar pearlite. The carbon content of the inclusion was therefore considerably lower than that of the chromium steel...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.steel.c9001490
EISBN: 978-1-62708-232-7
.... Fig. 15 TEM replica of the ferrite/pearlite structure at C in Figure 2 showing fresh pearlite lamellae; picral etch; 4400×. Fig. 16 TEM replica of ferrite/pearlite structure at D in Figure 2 showing both fresh pearlite lamellae and partially dissolved pearlite lamellae, picral etch...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001816
EISBN: 978-1-62708-241-9
... and by intergranular sliding of ferrite/ferrite and ferrite/pearlite, just as it occurs in stage III creep behavior. The behavior is confirmed through the Ashby-Verrall model, according to which the dislocation creep (power-law creep) and diffusion creep (linear-viscous creep) occur simultaneously. structural...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001813
EISBN: 978-1-62708-241-9
... and carbon–chromium–molybdenum steels in which the carbides formed have a composition M x C y . Over-aging promotes the coalescence of the small carbides formed from the pearlite decomposition and prolonged aging leads to a structure of ferrite with an almost uniform distribution of spheroidized carbides...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001077
EISBN: 978-1-62708-214-3
... of the chip in a layer at least 0.2 mm (0.008 in.) thick. Fig. 5 Cross section through wedge-shaped area associated with initiation, showing large area of ferrite just inside the carburized layer of tooth in an otherwise martensitic structure. 5% nital etch. 40×. Fig. 6 Cross section showing...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.process.c9001257
EISBN: 978-1-62708-235-8
... ammonium chloride solution according to Heyn. 1× The uncracked pipe showed a ferritic-pearlitic structure in micro-section. Except for grain coarsening and a partially spear-like formation of ferrite (Widmannstätten structure), no major changes had occurred in the vicinity of the weld seam due...
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
... (0.125 in.) minimum is recommended for diameters of 38 through 76 mm (1.5 through 3 in.) and 6.35 mm (0.25 in.) minimum for larger-diameter bars. Banding/Nonuniform Microstructure Banded structures present a major problem for all heat treatments because the banded layers have differences in alloy...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.chem.c9001213
EISBN: 978-1-62708-220-4
... Abstract Fragments of screen bars which as structural elements of a condenser had come into contact with cooling water from the mouth of a river were received. The screen bars were made of stainless austenitic Cr-Ni-Mo steel X 5 Cr-Ni-Mo18 10 (Material No. 1.4401). The bars were fractured...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c9001609
EISBN: 978-1-62708-229-7
...-centered cubic stainless steel. However, carbide precipitation occurs much faster in ferritic stainless steel, due to the higher C contents and much lower solubility of C in its bcc atomic structure. Unlike austenitic alloys, alloy 430 can be annealed at temperatures within its sensitization range...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c9001208
EISBN: 978-1-62708-229-7
... that pointed to a hardening of the material next to the seam. A longitudinal section through the fracture origin after various etches showed the structure presented in Figs. 1 and 2 . A low alloy additive was used for welding that was alloyed in contact with the spindle to such an extent...
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
..., the failure occurred due to typical contact corrosion wherein the alloyed welding seam represented the less noble electrode. The martensitic structure may have contributed to the failure as well. Due to the typical nature of the failure, no recommendations were made. Pipe Recuperators Welded joints...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.modes.c0092131
EISBN: 978-1-62708-234-1
...) supported the conclusion that the engine malfunctioned because one of the exhaust-valve springs had taken a 25% set in service. Relaxation in the spring material occurred because of the combined effect of improper microstructure (proeutectoid ferrite) plus a relatively high operating temperature...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.machtools.c0089534
EISBN: 978-1-62708-223-5
... at a slightly higher temperature to reduce surface and core hardness was recommended. Castings Hardness Jaws Porosity Shrinkage Spheroidal structure Tempering Low-alloy steel Brittle fracture Eight pairs of specially designed sand-cast low-alloy steel jaws that had fractured were submitted...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001779
EISBN: 978-1-62708-241-9
... and its grade is C30, which is accounted for low cavitation resistance alloy ( Table 1 ) [ 11 ]. Moreover, regards manufacturer’s documents there were no subsequent treatment on the pumps. Metallographic images showed that the microstructure was ferrite-pearlite in which amount of ferrite decreased from...
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
..., machining Warped casting Inclusions or Structural Anomalies G 100 Inclusions G 110 Metallic inclusions G 111 (a) Metallic inclusions whose appearance, chemical analysis or structural examination show to be caused by an element foreign to the alloy Metallic inclusions...
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
... in relatively large areas of ferrite. If the alloy content is low, the ferrite is characteristically gummy (soft and ductile); if the alloy content is high, the ferrite is tough. Carbides dispersed in either a low- or high-alloy ferrite matrix may cause tears and pits in the machined surface that cause stress...
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
...: Inclusions G 110: Metallic inclusions G 111 (a) Metallic inclusions whose appearance, chemical analysis or structural examination show to be caused by an element foreign to the alloy Metallic inclusions G 112 (a) Metallic inclusions of the same chemical composition as the base metal...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.modes.c9001165
EISBN: 978-1-62708-234-1
... graphite in a purely pearlitic matrix ( fig. 2 ) in the thicker cross sections. In the thinner cross sections, the graphite had precipitated to a large extent in a fine-leafed structure by supercooled solidification (granular graphite), and the matrix was predominantly ferritic in these regions ( fig. 3...
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
... of an overload failure. It also presents examples of thermally and environmentally induced embrittlement effects that can alter the overload fracture behavior of metals. atomic structure brittle cracking crack propagation crystalline structure ductile cracking ductility environmentally induced...