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Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.chem.c9001654
EISBN: 978-1-62708-220-4
... Abstract AISI type 321 stainless steel heat exchanger tubes failed after only three months of service. Macroscopic examination revealed that the leaks were the result of localized pitting attack originating at the water side surfaces of the tubes. Metallographic sections were prepared from both...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.aero.c0091318
EISBN: 978-1-62708-217-4
... Abstract Two freshwater tanks (0.81 mm (0.032 in) thick, type 321 stainless steel) were removed from aircraft service because of leakage due to pitting and rusting on the bottoms of the tanks. One tank had been in service for 321 h, the other for 10 h. There had been departures from...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001028
EISBN: 978-1-62708-214-3
... Abstract Several AISI type 321 stainless steel welded oil tank assemblies used on helicopter engine systems began to leak in service. One failure, a fracture on the aft side of a spot weld, was submitted for analysis. SEM fractography examination revealed fatigue failure. The failure initiated...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.process.c0047745
EISBN: 978-1-62708-235-8
... Abstract A 321 stainless steel radar coolant-system assembly fabricated by torch brazing with AWS type 3A flux, failed at the brazed joint when subjected to mild handling before installation, after being stored for about two years. It was revealed by visual examination of the failed braze...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.process.c0047749
EISBN: 978-1-62708-235-8
... Abstract A type 321 stainless steel (AMS 5570) pressure-tube assembly that contained a brazed reinforcing liner leaked during a pressure test. Fluorescent liquid-penetrant inspection revealed a circumferential crack extended approximately 180 deg around the tube parallel to the fillet...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.design.c0089730
EISBN: 978-1-62708-233-4
... Abstract Stainless steel liners (AISI type 321) used in bellows-type expansion joints in a duct assembly installed in a low-pressure nitrogen gas system failed in service. The duct assembly consisted of two expansion joints connected by a 32 cm (12 in.) OD pipe of ASTM A106 grade B steel...
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Published: 01 January 2002
Fig. 6 Type 321 stainless steel (ASME SA-213, grade TP321H) superheater tube that failed by thick-lip stress rupture. (a) Overall view showing a typical fishmouth rupture. Approximately 1 2 ×. (b) Unetched section from location between arrows in (a) showing extensive transverse More
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Published: 01 January 2002
Fig. 14 Type 321 stainless steel heat-exchanger bellows that failed by fatigue originating at heavy weld reinforcement of a longitudinal seam weld. (a) A section of the bellows showing locations of the longitudinal seam weld, the circumferential welds, and the fatigue crack. Dimensions given More
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Published: 01 January 2002
Fig. 19 The bottom of a type 321 stainless steel aircraft freshwater storage tank that failed in service as a result of pitting. This unetched section shows subsurface enlargement and undercutting of one of the pits. Approximately 95× More
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Published: 01 January 2002
Fig. 49 Zinc-induced LME in 321 austenitic stainless steel. Etched in Vilella's reagent More
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Published: 01 January 2002
Fig. 50 SEM view of grains lost from 321 stainless steel by zinc-induced LME. Etched in Vilella's reagent More
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Published: 01 January 2002
Fig. 38 Apparent ductile fracture in a 321 stainless steel superheater tube (ASME SA-213 grade TP 321H). (a) Fracture is macroscale brittle because it is on a hoop plane. (b) Intergranular cracking is revealed and at magnification of 4 1 2 ×. (c) Higher magnification (100 ×) does More
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Published: 01 June 2019
Fig. 1 The bottom of a type 321 stainless steel aircraft freshwater storage tank that failed in service as a result of pitting. This unetched section shows subsurface enlargement and undercutting of one of the pits. Approximately 95× More
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Published: 01 June 2019
Fig. 1 Crack in the repair-welded area of a type 321 stainless steel fuel-nozzle-support assembly because of incorrect welding procedure. (a) Photograph showing the crack in the fillet on the front side of the support neck. Approximately 6×. (b) Section through the support neck. Arrow More
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Published: 01 June 2019
Fig. 1 Segments of a type 321 stainless steel radar coolant-system assembly that broke at a brazed joint between a bellows and a cup because of inadequate bonding between the brazing alloy and the stainless steel. (a) Portions of the broken coolant-system assembly; bellows is at A, cup at B More
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Published: 01 June 2019
Fig. 1 Section through the cracked wall of a type 321 stainless steel pressure tube (region A) showing the branched transgranular nature of the crack. The crack origin (arrow B) was at the inner surface of the tube, next to the braze (region C) joining the tube to the reinforcing liner (region More
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Published: 01 June 2019
Fig. 1 Typical pit appearance in AISI 321 stainless steel heat exchanger tube (etched with water, HNO 3 and HCl, 50×). More
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Published: 01 June 2019
Fig. 2 Typical pit appearance on the outside surface of an AISI 321 stainless steel blow-down tube (etched with water, HNO 3 and HCl, 50×). More
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Published: 15 January 2021
Fig. 49 Zinc-induced liquid metal embrittlement in 321 austenitic stainless steel. Etched in Vilella's reagent More
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Published: 15 January 2021
Fig. 50 Scanning electron microscope view of grains lost from 321 stainless steel by zinc-induced liquid metal embrittlement. Etched in Vilella's reagent More