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Nil ductility transition temperature

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Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c9001146
EISBN: 978-1-62708-229-7
... (Nil ductility Transition Temperature) for this material was approximately -51 deg C (-60 deg F). The fact that the material's NDTT was significantly out of the normal operating range of the pipe suggested an impingement of low temperature nitrogen (caused by a faulty torus inerting system) induced...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.chem.c0048840
EISBN: 978-1-62708-220-4
... and lessen the embrittlement effects of strain aging. Reference Reference 1. “Standard Method for Conducting Drop-Weight Test to Determine Nil-Ductility Transition Temperature of Ferritic Steels,” E 208, Annual Book of ASTM Standards , Vol 03.01 , ASTM, Philadelphia, 1984 , p 346 – 365...
Image
Published: 30 August 2021
Fig. 6 Plot of Charpy V-notch impact energy versus temperature. NDT, nil-ductility temperature; FTP, fracture transition plastic. Source: Ref 9 More
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.9781627081801
EISBN: 978-1-62708-180-1
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0006548
EISBN: 978-1-62708-180-1
... life (number of cycles) solution NACE National Association of Corrosion En- gineers NDE nondestructive evaluation NDI nondestructive inspection NDT nondestructive testing NDTT nil ductility transition temperature OD outside diameter OEM original equipment manufacturer OHA operating hazard analysis OSHA...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001065
EISBN: 978-1-62708-214-3
...). No attempt was made to determine the nil ductility transition temperature (NDTT) for the various materials. It appears, however, that all six specimens of the elbow material were in the “upper shelf” range—a region of relatively constant toughness that occurs after the NDTT has been surpassed. Impact test...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.rail.c0089716
EISBN: 978-1-62708-231-0
...-notch testing gave a 20 J (15 ft ⋅ lbf) transition temperature of -7 to 5 °C (20 to 40 °F) for the shell plate and -1 to 5 °C (30 to 40 °F) for the side support plates. Drop-weight tests on the shell plate gave a nil-ductility temperature of 5 to 10 °C (40 to 50 °F). Conclusions The fracture...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001055
EISBN: 978-1-62708-214-3
... (60 °F). All of the samples failed at 3.4 J (2.5 ft·lbf); therefore, additional samples were selected in an attempt to determine the nil ductility curve for the steel. Samples from the first failure were also tested, as were three normalized specimens. The results are presented in Table 3 . Results...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.bldgs.c9001135
EISBN: 978-1-62708-219-8
... recrystallization of the grain structure throughout the plate. An increase in grain size means an. increase in transition temperature and nil ductility temperature of approximately 2.3 C per Δd − 1 2 . In addition, the tensile ductility and toughness. will decrease. Segregation has always been a problem...
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.a0006809
EISBN: 978-1-62708-329-4
... of upper and lower shelf values (often ≈ T 2 ) T 4 : Arbitrary value of energy absorbed (CVN), for example, 20 J (15 ft · lbf) for low-strength steel; ductility transition temperature T 5 : 100% cleavage fracture; nil-ductility temperature Fig. 6 Plot of Charpy V-notch impact energy...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006778
EISBN: 978-1-62708-295-2
... by hardness check or destructive testing, chemical analysis • Loading direction may show failure was secondary • Short-term, high-temperature, high-stress rupture has ductile appearance (see creep) • Load exceeded the dynamic strength of the part • Check for proper alloy and processing as well as proper...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c9001477
EISBN: 978-1-62708-229-7
... crystallinity. Several methods exist for assessing the ductile/brittle transition temperature. These include: Temperature equivalent to 20 ft. lbs. energy absorption = 65°C Temperature equivalent to 50% crystallinity = 76°C Temperature equivalent to point of inflexion of curve = 71°C...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006761
EISBN: 978-1-62708-295-2
... or surface alteration/contamination of the material. An example of the drop weight impact test is ASTM International E 208 ( Ref 9 ). The ASTM International E 208 drop weight test is used to determine the nil-ductility transition (NDT) temperature of ferritic steels 15.9 mm (⅝ in.) thick or thicker...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003543
EISBN: 978-1-62708-180-1
... was secondary• Short-term, high-temperature, high-stress rupture has ductile appearance (see creep) • Load exceeded the dynamic strength of the part• Check for proper alloy and processing as well as proper toughness, grain size• Loading direction may show failure was secondary or impact induced• Low...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c9001609
EISBN: 978-1-62708-229-7
... had been positioned on the outside of the bend. The welds had a coarse-grained microstructure that was indicative of brittleness and an elevation in the nil ductility transition temperature ( Fig. 6 ). Repositioning the weld seams to the neutral axis of the bend prevented further problems. Fig. 6...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0001818
EISBN: 978-1-62708-180-1
... they determine whether the material is stressed above or below any ductile-to-brittle transition temperature below which relatively low energy fractures can occur. Other degradation mechanisms, such as corrosion and scaling; stress corrosion; erosion from flowing gases, liquids, and solids; hydrogen damage...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.9781627082952
EISBN: 978-1-62708-295-2
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003512
EISBN: 978-1-62708-180-1
... brittle fractures of steels occur because structural components are operating at temperatures below the ductile-brittle transition temperature or the nil-ductility transition temperature. Consequently, the structure is unable to maintain subcritical crack growth and failure occurs in a catastrophic manner...
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.a0006812
EISBN: 978-1-62708-329-4
... the material is stressed above or below any ductile-to-brittle transition temperature below which relatively low-energy fractures can occur. Other degradation mechanisms, such as corrosion and oxidation; stress corrosion; erosion from flowing gases, liquids, and solids; hydrogen damage; creep and stress...
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.a0006808
EISBN: 978-1-62708-329-4
... construction, and a lack of understanding associated with a transition from ductile to brittle fracture behavior of structural steels with decreasing temperature. Fracture-initiation sites were identified, and crack-arrestor plates were added during redesign. No cracks were observed to pass the crack arrestors...