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primary melting

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Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.process.c9001217
EISBN: 978-1-62708-235-8
... coarser network of rod-shaped and plate-shaped precipitates was found, that probably corresponded to the primary grain boundaries, or to the grain boundaries or twin planes of the austenite formed during solidification of the melt. These particles could have been aluminum nitride judging by their shape...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.conag.c9001200
EISBN: 978-1-62708-221-1
... in a basic mass of pearlite with little ferrite. But the thin-walled part showed a structure of dendrites of precipitated primary solid solution grains with pearlitic-ferritic structure and a residual liquid phase with granular graphite in the ferritic matrix. The structure was formed by undercooling...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.process.c9001197
EISBN: 978-1-62708-235-8
... of the primary solid solution precipitated in the residual melt. A third crankcase had fractures in two places, first at the frontal end wall and second at the thinnest point between two bore holes. In all three cases casting stresses caused by unfavorable construction and rapid cooling were responsible...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001364
EISBN: 978-1-62708-215-0
... morphology of the impeller fragments suggested that the aluminum had melted and resolidified. The deposits were similar in composition and were identified by XRD as consisting primarily of aluminum trifluoride. In addition, EDS analysis detected major amounts of chlorine and iron. Results of a combustion...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.process.c9001252
EISBN: 978-1-62708-235-8
... Crack and precipitates at primary grain boundaries. Unetched longitudinal section. 100 × Fig. 8 Grain boundary precipitates in polarized light. Longitudinal section. 1200 × The melting of the steel in the basic electric arc furnace with a high content of dissociated nitrogen permitted...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.mech.c9001254
EISBN: 978-1-62708-225-9
... Abstract The specified elongation of 10% could not be achieved in several hollow pinion gear shafts made of cast Cr-Mo steel GS 35 Cr-Mo 5 3 that were heat treated to a strength of 90 kp/sq mm. The steel was melted in a basic 3 ton arc furnace and deoxidized in the furnace and in the pan...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.process.c9001251
EISBN: 978-1-62708-235-8
...% ferrosilicon powder and coke the 2-ton melt was deoxidized in a ladle with 3 kg aluminum, and was cast in wet sand molds. The pieces were stripped from the mold while red hot and were cooled in air and normalized at 900° C for 3 hours. The sender reported that tendency toward abnormal fractures rose...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001062
EISBN: 978-1-62708-214-3
... that occur in 9% Ni steel castings was examined on cast steels melted in the laboratory. It was found that the internal cracks originating at austenitic grain boundaries that coincide with primary dendrite interfaces were prevented by molybdenum addition. Internal cracks were closely related to sulfur...
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
... of unknown severity and serve as a crack-initiation site during fabrication or in service. Corrosion and wear damage can also be assisted by discontinuities, especially at the surface. These flaws may be created from the melting practices and solidification of ingot, the primary or secondary working...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001838
EISBN: 978-1-62708-241-9
.... pipe hot cracking grain boundary segregation stainless steel tear ridges melt bridging microfractography induction heating frequency X6CrNiMoTi17-12-2 (titanium-stabilized austenitic stainless steel) UNS S31635 Introduction Large austenitic stainless steel piping used for manifolds...
Image
Published: 01 January 2002
Fig. 4 Failed nose landing gear socket assembly due to LMIE. (a) Overall view of the air-melted 4330 steel landing gear axle socket. Arrow A indicates the fractured lug; arrow B, the bent but unfailed lug. Arrow C indicates the annealed A-286 steel interference-fit plug containing the grease More
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001269
EISBN: 978-1-62708-215-0
... Abstract Recurring, premature failures occurred in TiN-coated M2 gear hobs used to produce carbon steel ring gears. Fractographic and metallographic examination, microhardness testing, and chemical analysis by means of EDS revealed that the primary cause of failure was a coarse cellular carbide...
Image
Published: 15 January 2021
Fig. 5 Failed nose landing gear socket assembly due to liquid-metal-induced embrittlement (LMIE). (a) Overall view of the air-melted 4330 steel landing gear axle socket. Arrow A indicates the fractured lug; arrow B, the bent but unfailed lug. Arrow C indicates the annealed A-286 steel More
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006760
EISBN: 978-1-62708-295-2
... with red copper in dezincified area and darker band on the inside diameter. Ferric chloride etch. Original magnification: 5×. (d) Two-phase brass. The beta phase dissolves first. Ferric chloride etch Temperature as the Primary Factor Incipient Melting In incipient melting, the metal is exposed...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.homegoods.c0090457
EISBN: 978-1-62708-222-8
... resulting from a relatively high strain rate event and/or significant stress concentration. A relatively sharp corner formed by a retaining tab on the older design was shown to be a primary cause of the failures. Design Injection moldings Latches Stress concentration Polyacetal Brittle fracture...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.aero.c9001505
EISBN: 978-1-62708-217-4
... disc are indicated. Fig. 2 Cross-section of output shaft assembly. All of the fractures were located in the upper and lower discs of the output shaft assembly. Examination of the fractures confirmed the primary mode of failure to be fatigue. In the upper disc, fatigue was low stress, high...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.bldgs.c9001205
EISBN: 978-1-62708-219-8
.... This was the primary cause of fracture. Design Tubes Welded joints Welded steel Joining-related failures Brittle fracture A cross crowned by a gilded cock on a church steeple hung in a slanted position from its support after a stormy night ( Fig. 1 ). Figure 2 shows the construction of this support...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001111
EISBN: 978-1-62708-214-3
... a high level of hardenability, as judged by its microstructure. The full-thickness cross section of this plate exhibited a microstructure characteristic of properly melted and heat treated A517 grade F steel. At a distance of 11 mm ( 7 16 in.) from the quenched end, the microstructure was 95...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001283
EISBN: 978-1-62708-215-0
... of segregation was suspected to be the use of improperly made master alloys. Use of improved melting techniques and proper master alloys was recommended. Fracturing Master alloys Segregations L77 Al-4Cu Metalworking-related failures Background During the preproduction stages of forging...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c9001682
EISBN: 978-1-62708-229-7
.... These low temperature, low pressure reactors use heavy water as a neutron moderator and as the primary coolant for the reactor core and internal components. Heavy water is circulated through the reactor by six primary coolant loops. Each loop, and the reactor tank, is fabricated from austenitic stainless...