1-20 of 172 Search Results for

Sigma phase

Sort by
Image
Published: 01 October 2014
Fig. 2 Sigma phase region in the Fe-Cr phase diagram More
Image
Published: 01 June 2016
Fig. 22 Example time-temperature diagrams of carbide and sigma phase in an age-hardenable superalloy (Udimet 100). Source: Ref 13 More
Image
Published: 01 January 2002
Fig. 39 Light micrograph showing sigma phase revealed by selective etching with 10N KOH (electrolytic). The brittle sigma phase caused extensive cracking in a 25%Cr-12%Ni cast heat treatment basket hook. More
Image
Published: 01 December 2004
Fig. 17 Sigma phase in 312 weld metal, aged at 816 °C (1500 °F) for 160 h, was revealed using standard Murakami's reagent at 80 °C (175 °F) for 60 s. More
Image
Published: 01 December 2004
Fig. 19 Sigma phase in 312 weld metal, aged at 816 °C (1500 °F) for 160 h, was revealed using aqueous 20% NaOH at 3 V dc for 10 s. More
Image
Published: 01 December 1998
Fig. 10 Kikuchi pattern identification of sigma phase in stainless steel following exposure to elevated temperature. (a) Backscattered electron image. Arrow indicates the dark sigma phase identified by the Kikuchi patterns. (b) Backscattered electron Kikuchi pattern. (c) Computer solution More
Image
Published: 27 April 2016
Source: J. Zhanpeng, A Study of the Range of Stability of Sigma Phase in Some Ternary Systems, Scand. J. Metall. , Vol 10, 1981, p 279–287 ( Ref 2 ) More
Image
Published: 15 January 2021
Fig. 48 Light micrograph showing sigma phase revealed by selective etching with 10 N KOH (electrolytic). The brittle sigma phase caused extensive cracking in a 25%Cr-12%Ni cast heat treatment basket hook. More
Image
Published: 01 January 2002
Fig. 6 Crack propagation through delta ferrite and sigma phases in type 347 stainless steel. Source: Ref 3 More
Image
Published: 01 January 2002
Fig. 57 Sigma (σ) phase in cast heat-resistant alloy HH, type II. Intermetallic phases, such as σ, can greatly reduce the ductility of many high-temperature alloys in service at temperatures from 480 to 955 °C (900 to 1750 °F). More
Image
Published: 30 August 2021
Fig. 33 Sigma (σ) phase in cast heat-resistant alloy HH, type II. Intermetallic phases, such as σ, can greatly reduce the ductility of many high-temperature alloys in service at temperatures from 480 to 955 °C (900 to 1750 °F). More
Series: ASM Handbook
Volume: 9
Publisher: ASM International
Published: 01 December 2004
DOI: 10.31399/asm.hb.v09.a0003737
EISBN: 978-1-62708-177-1
... the gamma prime phase, gamma double prime phase, eta phase, laves phase, sigma phase, mu phase, and chi phase in wrought heat-resistant alloys. cobalt-base heat-resistant alloys ferrite grinding heat-resistant alloys iron-base heat-resistant alloys macroetching magnetic etching metallography...
Series: ASM Handbook
Volume: 1
Publisher: ASM International
Published: 01 January 1990
DOI: 10.31399/asm.hb.v01.a0001039
EISBN: 978-1-62708-161-0
... embrittlement, strain-age and aluminum nitride embrittlement, thermal embrittlement, quench cracking, 475 deg C and sigma phase embrittlement (in FeCr alloys), temper embrittlement, and embrittlement caused by neutron irradiation. In addition, the article covers stress-corrosion cracking along with properties...
Series: ASM Handbook
Volume: 19
Publisher: ASM International
Published: 01 January 1996
DOI: 10.31399/asm.hb.v19.a0002403
EISBN: 978-1-62708-193-1
... room-temperature mechanical properties and fatigue endurance limits of stainless steels. Stainless steels are susceptible to embrittlement during thermal treatment or elevated-temperature service. The article discusses embrittlement in terms of sensitization, 475 deg C embrittlement, and sigma-phase...
Image
Published: 01 December 2004
Fig. 20 Use of modified versions of Murakami's reagent to color delta ferrite and sigma phase in stainless steel welds. (a) Delta ferrite colored blue and brown in an austenitic matrix in type 312 stainless steel weld metal (as-welded) using modified Murakami's reagent (30 g sodium hydroxide More
Image
Published: 15 January 2021
Fig. 27 Coker tube damage (Example 15). (a) Tube interior contains longitudinal cracks in the thick scale. (b) Near-surface microstructural alteration with substantial carbide formation in the austenitic matrix. (c) Near-surface microstructure including sigma phase. Original magnification: 500 More
Image
Published: 27 April 2016
Source: R.C. Hansen and A. Raman, Alloy Chemistry of Sigma (Beta-U)-Related Phases. III. Sigma-Phases with Non-Transition Elements, Z. Metallkd ., Vol 61, 1970, p 115–120 ( Ref 29 ) More
Image
Published: 15 January 2021
Fig. 15 Logarithmic plot of stress-rupture stress versus rupture life for nickel-base alloy U-700 at 815 °C (1500 °F). The increasing slope of the curve to the right of the sigma break is caused by sigma-phase formation. More
Image
Published: 01 January 2002
Fig. 12 Logarithmic plot of stress-rupture stress versus rupture life for nickel-base alloy U-700 at 815 °C (1500 °F). The increasing slope of the curve to the right of the sigma break is caused by sigma-phase formation. More
Image
Published: 15 January 2021
Fig. 27 Comparison of (a) bright-field, (b) differential interference contrast, and (c) dark-field illumination for viewing a partially fractured (by impact) specimen of AISI type 312 weld metal containing substantial sigma phase. Original magnification: all 240× More