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Sensitization

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Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.modes.c0046476
EISBN: 978-1-62708-234-1
... than 0.03% carbon had been sensitized and placed in contact in service with a corrosive medium at temperatures in the sensitizing range. Recommendations included changing material for the pot from type 304 stainless steel to Hastelloy N (70Ni-17Mo-7Cr-5Fe). Maximum corrosion resistance and ductility...
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Published: 01 June 2019
Fig. 1 Cracking in a 5083 aluminum alloy ship hull caused by sensitization. Courtesy of MDE Engineers, Inc. More
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Published: 30 August 2021
Fig. 24 Sensitization of austenitic stainless steel. (a) Normal distribution of carbides. Original magnification: 100×. (b) Sensitized as carbides precipitated in grain boundaries on cooling from 1040 °C (1900 °F) More
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c0091640
EISBN: 978-1-62708-229-7
.... Electric power generation Sensitization Steam Valve stem 17-4 PH UNS S17400 Stress-corrosion cracking Heat treating-related failures A 9 cm (3.5 in.) diameter valve stem made of 17-4 PH (AISI type 630) stainless steel, which was used for operating a 61 cm (24 in.) gate valve in a steam power...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.aero.c0047598
EISBN: 978-1-62708-217-4
... surfaces confined to the HAZs of the welds. Microscopic examination of sections transverse to the weld cracks showed severe intergranular corrosion in the HAZ. The fractures appeared to be caused by loss of corrosion resistance due to sensitization, that could have been induced by the temperatures attained...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.med.c0048400
EISBN: 978-1-62708-226-6
... not to be in compliance with standards (type 304 stainless steel without molybdenum). The screws and washers were found to be made of remelted implant-quality type 316L stainless steel and were intact. Signs of sensitization, characterized by chromium carbide precipitates at the grain boundaries, were revealed...
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Published: 01 June 2019
Fig. 2 Microstructure of 5083 aluminum alloy ship hull that has been sensitized. Courtesy of MDE Engineers, Inc. More
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Published: 01 June 2019
Fig. 3 Scanning electron micrograph of sensitized 5083 aluminum microstructure shown in Fig. 28. Courtesy of MDE Engineers, Inc. More
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Published: 01 June 2019
Fig. 4 Cavity in the sensitized area. 10 × More
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Published: 01 June 2019
Fig. 6 Grain boundary carbides and creep lines in the sensitized area. 800 × More
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Published: 01 June 2019
Fig. 5 The matrix was sensitized as evidenced by the presence of continuous network of chromium carbide at the grain boundaries. More
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Published: 01 January 2002
Fig. 39 Temperature dependence of the strain-rate sensitivity of pure aluminum and alloy 2024. Note 2024-O becoming negative near room temperature. Source: Ref 63 More
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Published: 01 January 2002
Fig. 4 Notch sensitivity versus notch radius for various metals. Approximate values (note shaded band). Not verified for deep notches thickness/radius. Source: Ref 9 More
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Published: 01 December 1993
Fig. 4 Slightly sensitized microstructure of the unswaged section of the tube, consisting of austenite grains with carbides along the grain boundaries. Oxalic acid electrolytic etch. Top, 62×. Bottom, 496× More
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Published: 30 August 2021
Fig. 25 Field failure of burner fan impeller due to sensitizing of type 302 austenitic stainless steel near weld zone More
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.process.c0089459
EISBN: 978-1-62708-235-8
... and propagated by fatigue during continued exposure of the rods to severe cyclic loads in service. The loads on the rods developed tensile and bending stresses in the connecting ends. Contributory factors were: The presence of a notch-sensitive banded structure containing alternately soft (ferrite...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.aero.c0091533
EISBN: 978-1-62708-217-4
... with oxalic acid) supported the conclusion that the clamp fractured by SCC because the work metal was sensitized. Sensitization occurred during long-term exposure to the service temperature; the effects of sensitization were intensified as a result of cold forming. Recommendations included using a work metal...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001060
EISBN: 978-1-62708-214-3
... was caused by intergranular corrosion/stress-corrosion cracks that initiated from the external surface of the pipe reducer section. Contributory factors were the sensitized condition of the flange and the concentration of corrosive elements from the bleach stock plant environment on the external surface...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.marine.c0091350
EISBN: 978-1-62708-227-3
... couples formed between precipitates and the alloy matrix, leading to severe intergranular attack. No recommendations were made. Marine environments Sensitization Ship hulls 5083 UNS A95083 Intergranular corrosion The 5 xxx series of aluminum alloys are often selected for weldability...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.matlhand.c0048052
EISBN: 978-1-62708-224-2
... occurred in links having hardness values in the range of 375 to 444 HRB. It was revealed by the supplier that the previous hardness level of 302 to 375 HRB was increased to minimize wear which made the links were made notch sensitive and resulted in fractures that initiated at the butt-weld flash...