Menu
Search
Filters
Close
Menu

Celebrate World Corrosion Awareness Day with 20% off eCourses and eBooks with code WCAD2024 at checkout!

51318-10700-Environmentally Assisted Cracking of High Strength Nickel Based Alloys Under Cathodic Protection

Picture for Environmentally Assisted Cracking of High Strength Nickel Based Alloys Under Cathodic Protection
Available for download

Environmentally assisted cracking of high strength nickle based alloys was investigated in 3.5wt% NaCl under cathodic protection.

Product Number: 51318-10700-SG
Author: Ramopal Thodla
Publication Date: 2018
Industry: Materials Selection and Design
$0.00
$20.00
$20.00

Environmentally assisted cracking of high strength nickle based alloys under was investigated in 3.5wt% NaCl under cathodic protection. Rising displacement tests were performed on C22HS and MP98T were performed at a slow K-rate of 0.005 Nmm*-3/2/s. The result suggests that there is no significant environmental effect for MP98T. However C22HS exhibited a decrease in the initiation toughness. Tests performed under K control under a range of conditions on 718 and K-500. In general, the crack growth rate (CGR) measured under constant K were lower than those obtained under rising displacement tests under similar conditions. The CGR in both 718 decreased with decreasing potential. The CGR was also observed to depend strongly on the loading mode. There m was a strong effect of increasing K, with with increasing K tests resulting in substantially higher CGR’s than at constant under similar conditions. The above results suggest that the rate limiting step for crack propagation may be the generation of hydrogen at the tip end. A crack strain rate based model was applied to rationalize the data though more work is needed to establish the various parameters associated with the model.

Key Words: Environmentally Assisted Cracking, High Strength Nickle Based Alloys, Cathodic Polarization, 718, C22HS, dK/da effect

Environmentally assisted cracking of high strength nickle based alloys under was investigated in 3.5wt% NaCl under cathodic protection. Rising displacement tests were performed on C22HS and MP98T were performed at a slow K-rate of 0.005 Nmm*-3/2/s. The result suggests that there is no significant environmental effect for MP98T. However C22HS exhibited a decrease in the initiation toughness. Tests performed under K control under a range of conditions on 718 and K-500. In general, the crack growth rate (CGR) measured under constant K were lower than those obtained under rising displacement tests under similar conditions. The CGR in both 718 decreased with decreasing potential. The CGR was also observed to depend strongly on the loading mode. There m was a strong effect of increasing K, with with increasing K tests resulting in substantially higher CGR’s than at constant under similar conditions. The above results suggest that the rate limiting step for crack propagation may be the generation of hydrogen at the tip end. A crack strain rate based model was applied to rationalize the data though more work is needed to establish the various parameters associated with the model.

Key Words: Environmentally Assisted Cracking, High Strength Nickle Based Alloys, Cathodic Polarization, 718, C22HS, dK/da effect

Product tags
Also Purchased
Picture for Evaluation of Corrosion and EAC Susceptibilities of Materials Used for Wireline/Slickline Downhole Environment in HPHT Sour Environment
Available for download

51318-10688-Evaluation of Corrosion and EAC Susceptibilities of Materials Used for Wireline/Slickline Downhole Environment in HPHT Sour Environment

Product Number: 51318-10688-SG
Author: Jie He / Lizheng (Leo) Zhang / Rachel Zhou / Adan Herrera / David Ball / Peter Ellis
Publication Date: 2018
$20.00

Corrosion and EAC resistance of 14 heats of wireline materials, including a cold-rolled carbon steel, low-alloy steels, stainless steels, titanium alloys, nickel-based alloys, and copper-based alloys, were evaluated.
Picture for Evaluation of the Effect of Oxygen on CRA Materials
Available for download

51318-10799-Evaluation of the Effect of Oxygen on CRA Materials

Product Number: 51318-10799-SG
Author: Arwa Al Wahaibi / Talal Al Nabhani / Pedro Rincon Flores / Nassar Al Behalni
Publication Date: 2018
$20.00

This paper will present the testing results and the effect of oxygen on Austenitic Stainless Steel Grade 316L, Duplex Stainless Steel (22% Cr DSS) and Super Duplex Stainless Steel (25% Cr SDSS).
Picture for Stress Corrosion Cracking of Stainless Steel in Heavy Black Liquor - Mill Experience.
Available for download

51318-10701-Stress Corrosion Cracking of Stainless Steel in Heavy Black Liquor - Mill Experience.

Product Number: 51318-10701-SG
Author: Stephen Clarke / Walter Bursey / J.D. Irving
Publication Date: 2018
$20.00

This paper describes the cracking failure of a UNS S30403 (304L) stainless steel 72% heavy black liquor storage tank at a Canadian bleached kraft pulp mill.
Categories
Industry
Recently viewed
Popular tags
View all

Association for Materials Protection and Performance

© AMPP All Rights Reserved.
Membership Terms of Content Use
Contact Customer Support