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recrystallization

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Image
Published: 01 June 2019
Fig. 4 Cold deformation and recrystallization under a groove. Longitudinal section, etch: Nital. 100 × More
Image
Published: 01 December 2019
Fig. 2 Evolution of recrystallization kinetics during the finishing passes of steels with and without Nb More
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.process.c9001581
EISBN: 978-1-62708-235-8
... Abstract A heavily worked 304 stainless steel wire basket recrystallized and distorted while in service at 650 deg C (1200 deg F). This case study demonstrates that heavily cold worked austenitic stainless steel components can experience large losses in creep strength, and potentially...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.matlhand.c0048035
EISBN: 978-1-62708-224-2
.... Recrystallization of the steel was revealed during microscopic examination of the wires adjacent to the break which indicated that the wires had been heated in excess of 700 deg C (1292 deg F). The tensile strength of the wires in the rope that broke was 896 MPa whereas the specification required it to be 1724 MPa...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.matlhand.c9001244
EISBN: 978-1-62708-224-2
... fractures. The fracture probably was induced by the pressing-in or abrading of the sharp steel band edges into the surface of the cross bars. Torsion fatigue fractures may have started from these notches. Relaxation then contributed positively through recovery and recrystallization. Such damage occurs less...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001829
EISBN: 978-1-62708-241-9
.../energy dispersive spectroscopy, and x-ray diffraction. It was shown that degradation is driven by chemical and mechanical differences, oxide growth, depletion, and recrystallization, the combined effect of which results in exfoliation, spallation, and mechanical thinning. References References 1...
Image
Published: 01 December 2019
Fig. 4 Microstructures observed by means of optical microscopy: ( a ) wire spacer, consisting of recrystallized ferrite–pearlite grains; ( b ) HAZ between wire spacer and weld metal consisting of partially recrystallized ferrite grains; ( c ) weld metal composed of proeutectoid and acicular More
Image
Published: 01 January 2002
Fig. 18 A plot of [ K Ic ] 2 versus the area fraction of the fracture surface in the plastic zone through the unrecrystallized regions containing subgrains for two sets of specimens of partially recrystallized 7050 Al alloy ( Ref 48 ) More
Image
Published: 01 December 1993
Fig. 6 Cross-section through a fissure lip from tube 4.Note the preponderance of subgrains in the ferrite matrix due to distortion and recrystallization. The carbides have completelyspheroidized with no evidence of lamellar pearlite. 2% nital etch. 244× More
Image
Published: 01 January 2002
generated due to the nucleation and growth of void(s) around the constituent particles present in the recrystallized grains. More
Image
Published: 30 August 2021
Fig. 12 Typical microstructures of carbon steel boiler tube that ruptured as a result of rapid overheating. (a) Elongated grains near rupture resulting from rapid overheating below the recrystallization temperature. (b) Mixed structure near rupture resulting from rapid overheating between Ac 1 More
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001793
EISBN: 978-1-62708-241-9
... with complete detachment of a piece of the pipe Fig. 4 Microstructures observed by means of optical microscopy: ( a ) wire spacer, consisting of recrystallized ferrite–pearlite grains; ( b ) HAZ between wire spacer and weld metal consisting of partially recrystallized ferrite grains; ( c ) weld metal...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.modes.c0047199
EISBN: 978-1-62708-234-1
... material 1 (extruded stock) in the as-received (T6) temper is shown in Fig. 1(b) . The metal had an interior structure composed of highly deformed elongated grains (micrograph A, Fig. 1 ) and a thin, partly recrystallized grain structure at the surface (micrograph B, Fig. 1 ). The yield strength...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001264
EISBN: 978-1-62708-215-0
... Microstructure of material adjacent to the weld and at the fracture surface shown in Fig. 4 . 122×. The structure shown in Fig. 7 is recrystallized austenite. This structure was adjacent to the welds and at the fracture surface and was the direct result of repair welding, which created an annealed...
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
... ( rr ), ferrite–pearlite decohesion ( f ), and ferrite–ferrite ( r ) or pearlite–pearlite decohesion ( p ) are observed Fig. 1 Grain size versus time in the roughing process of steels with and without Nb Fig. 2 Evolution of recrystallization kinetics during the finishing passes...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001108
EISBN: 978-1-62708-214-3
... specimen compared with the straight specimen is probably a consequence of the cold bending followed by an in-service recrystallization caused by thermal conditions. Crack Origins/Paths The cracks that caused the perforation in the curved specimens were apparently nucleated by the interconnection...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.process.c0047080
EISBN: 978-1-62708-235-8
... in the inner surface. Macroetching revealed that the structure of the tubes had recrystallized in heat treatment. The macrostructure of the straight sections was uniformly fine grained. In the bends, there were exceedingly large grains, in some cases adjacent to very small grains. The size of the very...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.modes.c0060154
EISBN: 978-1-62708-234-1
... of the header metal. The presence of these very small grains could only be the result of cold deformation and subsequent recrystallization at elevated temperatures. Therefore, some plastic strain and cracking had occurred at temperatures well below the operating temperature, apparently as a result of thermal...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001340
EISBN: 978-1-62708-215-0
..., but no evidence of creep voids ( Fig. 6 ). Subgrains are evidence of dynamic recrystallization, and indicates the metal was stretched relatively rapidly while at high temperature. At areas on the fireside of the tubes away from the cracking, the microstructure was also completely spheroidized. Fig. 5...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.aero.c0006409
EISBN: 978-1-62708-217-4
... of connector threads showing incomplete thread form resulting from improper tapping The connector with the large male end was sectioned, and part of the fracture was metallographically examined. The connector exhibited an elongated recrystallized grain structure with cut threads ( Fig. 1b ). A cross...