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UNS G43400

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Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.aero.c9001538
EISBN: 978-1-62708-217-4
... gear 4340 UNS G43400 Intergranular fracture Stress-corrosion cracking Selected References • Lampman S. , Intergranular Fracture , Failure Analysis and Prevention , Vol 11 , ASM Handbook , ASM International , 2002 , p 641 – 649 10.31399/asm.hb.v11.a0003540...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.aero.c9001540
EISBN: 978-1-62708-217-4
... overhaul. The specific source of hydrogen which produced failure was not ascertainable. Aircraft components Chromium plating Cylinders Landing gear 4340 UNS G43400 Intergranular fracture Hydrogen damage and embrittlement Selected References • Hydrogen Damage and Embrittlement...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.usage.c9001539
EISBN: 978-1-62708-236-5
... grinding on high-strength steel; chromium should be stripped by electrochemical methods. Bolts Chromium plating Grinding cracks 4340 UNS G43400 Intergranular fracture During an overhaul, mechanics discovered a crack in a pivot bolt when they ground off the chromium plating. Investigation...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.aero.c9001542
EISBN: 978-1-62708-217-4
... time ultimately resulted in pitting of the metal. The combination of surface pitting and stress concentration at the nearby inclusions resulted in stress-corrosion cracking. Aircraft components Cylinders Landing gear Nonmetallic inclusions Stress concentration 4340 UNS G43400 Pitting...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.usage.c0046366
EISBN: 978-1-62708-236-5
... entrapped sand or debris from an external source. No recommendations were made. Chromium plating Cylinders Scoring B850-T5 UNS A08500 4340 UNS G43400 Abrasive wear Several large chromium-plated 4340 steel cylinders were removed from service because of deep longitudinal score marks in the...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.aero.c9001552
EISBN: 978-1-62708-217-4
... plating Crankshafts Magnetic particle testing Nitriding Surface grinding 4340 UNS G43400 Fatigue fracture Metalworking-related failures Surface treatment related failures Fig. 1 illustrates a crankshaft of AISI 4340, heat treated and nitrided all over, which failed in bending fatigue. The...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.modes.c0006417
EISBN: 978-1-62708-234-1
... 300-series stainless steel was also recommended. Cadmium plating Corrosion prevention Corrosion products Energy dispersive x ray analysis Inhibitors Iron oxides Materials substitution Pipe bends Scanning electron microscopy 4340 UNS G43400 (Other, general, or unspecified) corrosion...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.aero.c9001746
EISBN: 978-1-62708-217-4
... inadequate procedure, which resulted in bending moments being applied to the bolt threads. Acid pickling Bolts Cadmium plating Landing gear Torque 4340 UNS G43400 Surface treatment related failures Hydrogen damage and embrittlement Fig. 1 shows a failed beam from a landing gear—the...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.aero.c0046870
EISBN: 978-1-62708-217-4
... tolerances) was recommended as a standard maintenance procedure for shafts with long service lives. Aircraft components Shafts (power) Torsional fatigue AMS 6415 UNS G43400 Pitting corrosion Corrosion fatigue The hollow, splined alloy steel aircraft shaft shown in Fig. 1 cracked in service...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.aero.c0006444
EISBN: 978-1-62708-217-4
... in.). Protective Coatings Shot peening 4340 UNS G43400 Corrosion fatigue Pitting corrosion Several rotor blade components were received for laboratory analysis. These included the horizontal hinge pin and the associated nut the locking washer ( Fig. 1a , b , and c ). Fig. 1...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.aero.c9001906
EISBN: 978-1-62708-217-4
... defects 4340 UNS G43400 Metalworking related failures References 1. Anon. : in Product Design Guide for Forging , Forging Industry Association , Cleveland, OH , 1997 , p. 148 . 2. Anon. : in ASM Materials Engineering Dictionary , Davis J.R. , ed., ASM International...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.modes.c0091096
EISBN: 978-1-62708-234-1
... groove in the shaft had performed its function, but at a lower overload level than intended. Recommendations included increasing the fatigue strength of the shaft by shot peening the shear groove to minimize chatter. Shafts (power) Shot peening Torsional fatigue 4340 UNS G43400 Fatigue...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001384
EISBN: 978-1-62708-215-0
... bolts manufactured using controlled processes. Machine tools Milling cutters 4340 UNS G43400 Hydrogen damage and embrittlement Selected Reference • Hydrogen Damage and Embrittlement , Failure Analysis and Prevention , Vol 11 , ASM Handbook , ASM International , 2002...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001299
EISBN: 978-1-62708-215-0
... for cracks during periodic maintenance overhauls. Aerospace engines Airplanes Nonmetallic inclusions 4340 UNS G43400 Fatigue fracture Selected Reference • Fatigue Failures , Failure Analysis and Prevention , Vol 11 , ASM Handbook , ASM International , 2002 , p...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.usage.c0047823
EISBN: 978-1-62708-236-5
... UNS G43400 Fatigue fracture A plant utilized high-horsepower electric motors to drive large compressors required for a manufacturing process. Eight compressors had shafts made of 4340 steel quenched and tempered to a hardness of 35 to 39 HRC and gear-type couplings. The compressors operated for...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.process.c0049797
EISBN: 978-1-62708-235-8
... thus attributed to the presence of the quench crack flaw caused by an improper machining sequence and heat treatment practice. Connecting rods Quench cracking Threads 4340 UNS G43400 Mixed-mode fracture An AISI 4340 threaded steel connecting rod was part of a connecting linkage used...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.machtools.c9001519
EISBN: 978-1-62708-223-5
... change its cleaning practice from pickling to grit blasting. Bolts Pickling Vertical milling machines 4340 UNS G43400 Hydrogen damage and embrittlement Surface treatment related failures Selected Reference • Hydrogen Damage and Embrittlement , Failure Analysis and Prevention...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.conag.c0047212
EISBN: 978-1-62708-221-1
... propagate to fracture. No evidence of a defective design, improper microstructure, high inclusion count, or other stress-raising condition was observed. No recommendations were made. Earthmoving equipment Plastic deformation Shafts (power) 4340 UNS G43400 Fatigue fracture A steering knuckle...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.conag.c9001495
EISBN: 978-1-62708-221-1
... requirements and should have withstood normal operating conditions. The spacing of the gouge marks coincided with the spacing of the splines, indicative of careless assembly with the mating wheel gear. Assembling Axles Mining equipment Splines 4340 UNS G43400 Fatigue fracture One end of a...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.mech.c9001619
EISBN: 978-1-62708-225-9
... the splines. SEM examination revealed the splined shaft failed by fretting fatigue. Fretting fatigue Paper machines Shafts (power) 4340 UNS G43400 Fretting wear Fatigue fracture Wood chips can be efficiently turned into fiber for newsprint manufacture by the process of disc refining. A...