Server maintenance is scheduled for Saturday, December 21st between 6am-10am CST.

During that time, parts of our website will be affected until maintenance is completed. Thank you for your patience.

Search
Filters
Close

03126 PHYSICAL METALLURGY OF ALLOYS 718, 725, 725HS, 925 FOR SERVICE IN AGGRESSIVE CORROSIVE ENVIRONMENTS

Nickel-base alloys 718, 725, and 925 are commonly used in oil and natural gas production.  Being heavily alloyed multi-component systems; these materials require special consideration for processing and heat treatments.  This paper shows the effect of intergranular precipitates on mechanical properties and  slow strain rate (SSR) test results in sour oil patch environments.

 

Product Number: 51300-03126-SG
ISBN: 03126 2003 CP
Author: Sarwan Mannan, Ed Hibner, and Brett Puckett
Publication Date: 2003
$0.00
$20.00
$20.00

Processing conditions were designed to produce alloys 718 (UNS N07718), 725 / 725HS (UNS N07725), and 925 (UNS N09925) with essentially clean grain boundaries, partial coverage of grain boundaries by the precipitates, and full coverage of grain boundaries by the precipitates. Grain boundary precipitates were found to degrade room temperature impact strength. Partial coverage of grain boundaries by second phase particles did not adversely affect the properties in slow strain rate (SSR) tests conducted in the oil patch environments. However, the materials having grain boundaries fully covered with second phase particles had inferior properties in SSR testing.

Key Words: UNS N07718, UNS N07725, UNS N09925, slow strain rate, oil patch, microstructure, time-temperature-transformation diagram, grain boundary precipitates, processing

Processing conditions were designed to produce alloys 718 (UNS N07718), 725 / 725HS (UNS N07725), and 925 (UNS N09925) with essentially clean grain boundaries, partial coverage of grain boundaries by the precipitates, and full coverage of grain boundaries by the precipitates. Grain boundary precipitates were found to degrade room temperature impact strength. Partial coverage of grain boundaries by second phase particles did not adversely affect the properties in slow strain rate (SSR) tests conducted in the oil patch environments. However, the materials having grain boundaries fully covered with second phase particles had inferior properties in SSR testing.

Key Words: UNS N07718, UNS N07725, UNS N09925, slow strain rate, oil patch, microstructure, time-temperature-transformation diagram, grain boundary precipitates, processing

PRICE BREAKS - The more you buy, the more you save
Quantity
1+
5+
Price
$20.00
$20.00
Also Purchased
Picture for 05103 Laboratory Testing of Age-Hardenable Alloys
Available for download

05103 Laboratory Testing of Age-Hardenable Alloys 925 and 718, in Sour Gas Environments

Product Number: 51300-05103-SG
ISBN: 05103 2005 CP
Author: Rainer Behrens, Krupp VDM GmbH; Dinesh C. Agarwal, ThyssenKrupp VDM USA Inc.
$20.00
Picture for Hydrogen-Assisted Failure in Ni-Based Superalloy 718
Available for download

51316-7459-Hydrogen-Assisted Failure in Ni-Based Superalloy 718

Product Number: 51316-7459-SG
ISBN: 7459 2016 CP
Author: Zahra Tarzimoghadam
Publication Date: 2016
$20.00