The influence of heat treatment on the resistance of Kh18N10T steel to corrosion cracking in sulfur pulp

1974 ◽  
Vol 7 (6) ◽  
pp. 712-713
Author(s):  
G. V. Karpenko ◽  
R. F. Zagoruiko ◽  
Yu. I. Babel
Keyword(s):  
Heat Treatment ◽  
Corrosion Cracking ◽  
Kh18n10t Steel ◽  
Sulfur Pulp

scholarly journals Stress Corrosion Cracking of Additively Manufactured Alloy 625

Materials ◽  
2021 ◽  
Vol 14 (20) ◽  
pp. 6115
Author(s):  
Marina Cabrini ◽  
Sergio Lorenzi ◽  
Cristian Testa ◽  
Francesco Carugo ◽  
Tommaso Pastore ◽  
...  
Keyword(s):  
Heat Treatment ◽  
Hydrogen Embrittlement ◽  
Strain Rate ◽  
Stress Corrosion ◽  
Stress Corrosion Cracking ◽  
High Strain ◽  
Corrosion Cracking ◽  
Slow Strain Rate ◽  
Laser Source ◽  
Alloy 625

Laser bed powder fusion (LPBF) is an additive manufacturing technology for the fabrication of semi-finished components directly from computer-aided design modelling, through melting and consolidation, layer upon layer, of a metallic powder, with a laser source. This manufacturing technique is particularly indicated for poor machinable alloys, such as Alloy 625. However, the unique microstructure generated could modify the resistance of the alloy to environment assisted cracking. The aim of this work was to analyze the stress corrosion cracking (SCC) and hydrogen embrittlement resistance behavior of Alloy 625 obtained by LPBF, both in as-built condition and after a standard heat treatment (grade 1). U-bend testing performed in boiling magnesium chloride at 155 and 170 °C confirmed the immunity of the alloy to SCC. However, slow strain rate tests in simulated ocean water on cathodically polarized specimens highlighted the possibility of the occurrence of hydrogen embrittlement in a specific range of strain rate and cathodic polarization. The very fine grain size and dislocation density of the thermally untreated specimens appeared to increase the hydrogen diffusion and embrittlement effect on pre-charged specimens that were deformed at the high strain rate. Conversely, heat treatment appeared to mitigate hydrogen embrittlement at high strain rates, however at the slow strain rate all the specimens showed a similar behavior.

Effects of Cold Working and Heat Treatment on Caustic Stress Corrosion Cracking of Alloy 800M

2005 ◽  
Vol 297-300 ◽  
pp. 993-998 ◽  
Author(s):  
Chun Bo Huang ◽  
Guang Fu Li ◽  
Zhan Peng Lu ◽  
Jian Min Zeng ◽  
Wu Yang
Keyword(s):  
Heat Treatment ◽  
Residual Stress ◽  
Stress Corrosion ◽  
Stress Corrosion Cracking ◽  
Cold Working ◽  
Corrosion Cracking ◽  
Caustic Solution ◽  
Surface Films ◽  
Microstructure Examination ◽  
Increasing Temperature

The effects of cold working and heat treatment on caustic stress corrosion cracking (SCC) of mill annealed (MA) alloy 800M in boiling solution of 50%NaOH+0.3%SiO2+0.3%Na2S2O3 were investigated by means of microstructure examination, tensile test, X-ray stress analysis, SCC testing of C-rings, Auger electron spectroscopy (AES), scanning electron microscopy (SEM) and metallography. The microstructure of alloy 800M under tested conditions was austenite. With a train of 25% by cold working, the grains of alloy 800M became longer, yield strength (YS) and ultimate tensile strength (UTS) increased, elongation (δ ) decreased, residual stress and the susceptibility to SCC increased. With increasing temperature of heat treatment of alloy 800M with cold working, the grains became bigger , residual stress, YS and UTS decreased and δ increased, the susceptibility to SCC of alloy 800M decreased. In boiling caustic solution, SCC cracks on the surfaces of C-ring specimens polarized potentiostatically at –20mV/SCE initiated from pitting and propagated along grain boundaries. AES analysis indicated that the surface films on MA alloy 800M were enriched in nickel and depleted in iron and chromium.

Relationship Between Acid Intergranular Corrosion and Caustic Stress Corrosion Cracking of Alloy 600

CORROSION ◽  
1977 ◽  
Vol 33 (1) ◽  
pp. 20-26 ◽  
Author(s):  
G. J. THEUS
Keyword(s):  
Heat Treatment ◽  
Stress Corrosion ◽  
Stress Corrosion Cracking ◽  
Corrosion Cracking ◽  
Alloy 600 ◽  
Intergranular Attack ◽  
Electrochemical Tests ◽  
Stress Relieving ◽  
Service Conditions ◽  
The Relationship

Abstract Modified Streicher and 288 C (550 F) electrochemical caustic stress corrosion tests were performed on Alloy 600 to determine the relationship between acid intergranular attack susceptibility and caustic stress corrosion cracking (SCC) susceptibility. Mill annealed and solution annealed materials with and without a subsequent 621 C (1150 F) heat treatment (simulated stress relief) were evaluated. Susceptibility to attack in the Streicher test was greatest for material that had received a 621 C (1150 F) heat treatment, whereas this heat treatment caused the same material to be least susceptible to cracking in the electrochemical tests. The conclusions drawn from these results are: (1) stress relieving Alloy 600 does improve its resistance to caustic SCC, and (2) resistance of Alloy 600 to acid intergranular attack does not imply resistance of Alloy 600 to caustic SCC. Therefore, the results demonstrate the need for selecting corrosion qualification tests which are relevant to service conditions.

Effect of Cold Working and Heat Treatment on Stress Corrosion Cracking Behavior of Duplex Stainless Steel

1979 ◽  
Vol 65 (6) ◽  
pp. 617-626 ◽  
Author(s):  
Kikuo TAKIZAWA ◽  
Yasuhiko SHIMIZU ◽  
Eisaku YONEDA ◽  
Hokoto SHOJI ◽  
Imao TAMURA
Keyword(s):  
Heat Treatment ◽  
Stainless Steel ◽  
Stress Corrosion ◽  
Duplex Stainless Steel ◽  
Stress Corrosion Cracking ◽  
Cold Working ◽  
Corrosion Cracking ◽  
Cracking Behavior

Effect of strain-heat treatment on the tendency for corrosion cracking of pipe steel under stress

Metallurgist ◽  
2007 ◽  
Vol 51 (11-12) ◽  
pp. 581-587
Author(s):  
Yu. D. Morozov ◽  
O. N. Chevskaya ◽  
G. A. Filippov ◽  
A. A. Bat’kov ◽  
P. P. Stepanov
Keyword(s):  
Heat Treatment ◽  
Pipe Steel ◽  
Corrosion Cracking

Corrosion cracking resistance of type Kh18N12T steel melted from normal and virgin charges after heat treatment and thermomechanical working

1987 ◽  
Vol 22 (5) ◽  
pp. 529-531
Author(s):  
M. L. Bernshtein ◽  
L. G. Baryshnikov ◽  
S. V. Dobatkin ◽  
T. K. Zhdanovich ◽  
L. M. Kaputkina ◽  
...  
Keyword(s):  
Heat Treatment ◽  
Corrosion Cracking ◽  
Cracking Resistance ◽  
Thermomechanical Working
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