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Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.mech.c9001727
EISBN: 978-1-62708-225-9
... effect of galvanic coupling, hydrogen embrittlement. Bolts Galvanic corrosion Spacecraft 17-4 PH UNS S17400 Hydrogen damage and embrittlement Fig. 1 Success of the mission depends greatly on the reliability of high-strength stainless steel fasteners. Analysis of service failures...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.aero.c9001583
EISBN: 978-1-62708-217-4
... at the required aging temperature and follow-up mechanical testing. Army aviation Flight safety critical component Metallurgical investigation PH 13-8Mo UNS S13800 Heat treating-related failures Metalworking-related failures Background The U.S. Army Aviation and Missile Command (AMCOM...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.aero.c9001707
EISBN: 978-1-62708-217-4
... Abstract The failures of two aircraft components, one from a landing gear and the other from an ejector rack mechanism, were investigated. Both were made from PH 13-8 Mo (UNS S13800) precipitation-hardening stainless steel which had been heat treated to the H1000 and H950 tempers respectively...
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Published: 01 January 2002
Fig. 23 Two views of the fracture surface of a forged 17-4 PH stainless steel steam-turbine blade that failed by corrosion fatigue originating at severe corrosion pitting. (a) Light fractograph showing primary origin (arrow) and three secondary origins (along right edge below primary origin More
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Published: 01 January 2002
Fig. 39 Superimposed E -pH diagram of a 70Cu-30Zn alloy in 0.1 M NaCl. Lightly shaded area indicates the domain in which selective removal of zinc is expected in solutions free of copper ions. Intermediate shaded area indicates the domain in which both copper and zinc dissolves. Dark shaded More
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Published: 01 January 2002
Fig. 31 Power plant gate-valve stem of 17-4 PH stainless that failed by SCC in high-purity water. (a) A fracture surface of the valve stem showing stained area and cup-and-cone shearing at perimeter. 0.7×. (b) Micrograph showing secondary intergranular cracks branching from fracture surface More
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Published: 01 January 2002
Fig. 42 Effect of pH on time-to-fracture by SCC. Data are for brass in ammoniacal copper sulfate solution at room temperature. More
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Published: 01 January 2002
Fig. 1 The pH and oxidation reduction potential for growth of anaerobic bacteria able to reduce nitrate or sulfate (dots in plots) and for soils dominated by the microbial metabolism (boxes). Aerobic bacteria grow over a wide range of pH at E h > 300 mV (normal hydrogen electrode More
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Published: 01 January 2002
Fig. 10 Mass loss vs. number of compound impact cycles for 17-4 PH stainless steel counterfaces tested with CPM-10V steel specimens (impact stress 69 MPa). Source: Ref 26 More
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Published: 01 January 2002
Fig. 22 Original and improved designs of a 17-7 PH stainless steel valve-seat retainer spring. As originally designed, the inner tabs on the spring broke off as a result of fatigue, and the outer tab exhibited wear. More
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Published: 01 January 2002
Fig. 21 Effect of pH on the corrosion rate of steel by water at 310 °C (590 °F). Source: Ref 7 More
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Published: 01 June 2019
Fig. 1 Original and improved designs of a 17-7 PH stainless steel valve-seat retainer spring. As originally designed, the inner tabs on the spring broke off as a result of fatigue, and the outer tab exhibited wear. More
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Published: 01 June 2019
Fig. 1 Exposed crack surface of a chromium-plated 15-5 PH cylinder that failed following manufacturing. 32× More
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Published: 01 June 2019
Fig. 2 Exposed crack surfaces of a chromium-plated 15-5 PH cylinder that failed during pressure impulse testing. 9× More
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Published: 01 June 2019
Fig. 8 Stress-corrosion crack paths in 17-7 PH (CH900) are shown in top photo, those in Custom 455 (CH850) in bottom photo. Both samples were loaded in bending. In both cases, tensile side is up. More
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Published: 01 June 2019
Fig. 3 The relationship between hardness and toughness of 17-4 PH is almost linear. More
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Published: 01 June 2019
Fig. 12 Zn-depleted region in the nut showing selective dezincification of the β phase. More
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Published: 01 June 2019
Fig. 12 Tempered martensite microstructure of the PH 13-8 Mo stainless steel and transgranular internal crack from the shrink link cylinder wall (Vilella's etchant, ×1000). More
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Published: 01 June 2019
Fig. 18 Cleavage features of a piece of PH 13-8 Mo impact tested at liquid nitrogen temperature. More
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Published: 01 June 2019
Fig. 1 Power plant gate-valve stem of 17-4 PH stainless that failed by SCC in high-purity water. (a) A fracture surface of the valve stem showing stained area and cup-and-cone shearing at perimeter. 0.7×. (b) Micrograph showing secondary intergranular cracks branching from fracture surface. 50× More