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Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.aero.c0048616
EISBN: 978-1-62708-217-4
..., the material was changed to A-286, which is less susceptible to carbide precipitation. The bolt is strengthened by shot peening and rolling the threads after heat treatment. Avoiding temperatures in the sensitizing range is desirable, but difficult to ensure because of the application. Bolts Bolts...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.modes.c9001152
EISBN: 978-1-62708-234-1
... with 39 kg/sq mm tensile strength, which had been strengthened by welding plate strips on both sides had fractured in service; an axle tube out of 40 Mn 4 after DIN 17 200 from a paper fabrication machine, which had three short longitudinal slits distributed uniformly over its surface; welding to repair...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.mech.c9001158
EISBN: 978-1-62708-225-9
... defects and was of high purity, although a number of minor surface defects such as rolling laps were found. The spring was heat treated and its surface strengthened by shot-peening, but the surface was also decarburized to a depth of approximately 0.03 mm which resulted in a lowering of the surface...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.process.c9001190
EISBN: 978-1-62708-235-8
... at temperatures between 230 and 300 deg C after rolling the threads. This procedure would have reduced the internal stresses while maintaining strengthening gained by the cold deformation. Couplings Pipe Stress cracking Ms 63 Metalworking-related failures Intergranular fracture The brass pipe...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001845
EISBN: 978-1-62708-241-9
...-strengthening nickel-silicon bronze. To identify the root cause of failure, the rail operator led an investigation that included fractographic and microstructural analysis, hardness testing, inductively coupled plasma spectroscopy, and finite-element analysis. The fracture was shown to be brittle in nature...
Image
Published: 01 December 1992
Fig. 2 Schematic of the redesigned C130 aircraft main landing gear wheel, showing the double flange used to strengthen the wheel. More
Image
Published: 01 December 1992
Fig. 4 Longitudinal cross section of the failed pin. The fractures at the right. Arrows indicate circumferential cracks that initiated at the inside surface. Note the darkened layer of material at the inside surface (bottom). The round objects are steel shot used to strengthen the plastic More
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001126
EISBN: 978-1-62708-214-3
..., it is recommended that spandrel glass be heat strengthened or tempered. To be classified as tempered glass or heat-strengthened glass, the compressive stresses at the edge of the glass must be at least 67 or 38 MPa (9700 or 5500 psi), respectively. The building specifications for the spandrel glass call...
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
...-strengthened superalloy. While Haynes 188 has lower cobalt and carbon contents than ECY 768, it has higher nickel and tungsten contents for solid-solution strengthening. Based on the EDS line profiles across bond-coat/substrate interface, the authors suggest that the composition differences between two cobalt...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003545
EISBN: 978-1-62708-180-1
... superalloys 775–925 0.45–0.60 Burner cans for gas turbine engines Oxide dispersion-strengthened nickel-base alloys 1350–1400 0.55–0.65 Constant-load bulk deformation creep curves typically (but not always) consist of three distinct stages ( Fig. 3a ). The first stage (called primary creep...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006780
EISBN: 978-1-62708-295-2
... 850–950 0.45–0.55 Gas turbine blades Nickel-base superalloys 775–925 0.45–0.60 Burner cans for gas turbine engines Oxide-dispersion-strengthened nickel-base alloys 1350–1400 0.55–0.65 The creep behavior of polymeric materials is more complex, because most plastics respond as true...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.aero.c9001600
EISBN: 978-1-62708-217-4
... particles, evident in optical and SEM IT0011, IT0067, 01344AI, 1316HMW Fine (E-phase) dispersoids (Al 18 Mg 3 Cr 2 ), evident only in the TEM IT0011, IT0067, 01344AI, 1316HMW Strengthening precipitates, evident only in the TEM IT0067, 01344AI Ultrafine, matrix strengthening precipitates, evident...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001025
EISBN: 978-1-62708-214-3
... Fig. 1 Schematic of the C130 aircraft main landing gear wheel, showing the bolted assembly the brake housing, and the flange in which fracture occurred. Fig. 2 Schematic of the redesigned C130 aircraft main landing gear wheel, showing the double flange used to strengthen the wheel...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001756
EISBN: 978-1-62708-241-9
... blades were apparently free from any signatures of overheating like grain coarsening, grain boundary thickening, or dissolution of the strengthening precipitates, etc. The samples also revealed solution-treated and aged structures which were similar to that noticed in the samples sectioned from the other...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.process.c0046028
EISBN: 978-1-62708-235-8
... the region of failure on one of the latch tips indicated that fracture apparently occurred through a similar crack. A burned layer on the surface of the latch indicated that the cracks had been caused by improper grinding after hardening. Corrective Measures To strengthen the stop-arm latch tip...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001031
EISBN: 978-1-62708-214-3
...,” Report No. IITRI-P06150-P495A, IITRI/MRF, NASA—Marshall Space Flight Center, 27 Dec 1991 . 2. Swisher J.H. and Fuchs E.O. , Dispersion-Strengthening of Copper by Internal Oxidation of Two-Phase Copper-Zirconium Alloys , Copper and Its Alloys , Monograph and Report Series No. 34...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001123
EISBN: 978-1-62708-214-3
... that the actual composition with respect to aluminum, lead, and magnesium was different from the specified alloy. Scanning electron microscopy showed intergranular failure with enhanced aluminum and segregation of lead at grain boundaries. In this type of alloy, aluminum is used for strengthening through grain...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.modes.c9001691
EISBN: 978-1-62708-234-1
.... Never leave stagnant water in a system that is susceptible to corrosion; drain and dry the system if the water is not flowing. High-strength aluminum alloys depend on precipitated phases for strengthening and are susceptible to intergranular corrosion and pitting. Duraluminum-type alloys (Al-Cu...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.modes.c9001724
EISBN: 978-1-62708-234-1
... “hoop” load when in operation, arising from a combination of stresses which will be discussed later, so it is very desirable that the rather soft and yielding austenitic steel be hardened and strengthened — and this can be done only by cold working (actually, warm working). For such a large ring...
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
.... In order to avoid such damage in the future it was recommended to observe one or more of the following precautions: 1. Elimination of the grooves, which would simultaneously strengthen the cross section and relieve the notch effect. 2. Removal of the ferritic bright border. 3. Slow cooling in the mold...