Author: Mohammad Hossain
Publisher: LAP Lambert Academic Publishing
ISBN: 9783838360164
Category :
Languages : en
Pages : 200
Book Description
This investigation is focused on the evaluation of stress corrosion cracking (SCC), localized corrosion, and hydrogen embrittlement (HE) susceptibility of martensitic Alloy EP-823 in neutral and acidic solutions at ambient and elevated temperatures. While no failures were observed in smooth specimens in the neutral solution, failures were noticed in the 90 C acidic solution at constant-load (CL) leading to a threshold stress ( th) of 102 ksi. The presence of a notch reduced the th value to 91 ksi in a similar environment. The ductility (%El and %RA), time-to-failure (TTF), and true failure stress ( f) were gradually reduced in both environments with increasing temperature during SSR testing. The presence of a notch, however, enhanced the f value. All polarized specimens exhibited localized attack. The application of a controlled cathodic potential further reduced the ductility, TTF and of showing the characteristics of more brittle failures. Metallographic and fractographic evaluations revealed secondary cracks along the gage section, and combination of ductile and brittle failures at the primary fracture face, respectively."
Stress Corrosion Cracking and Hydrogen Embrittlement of Alloy EP-823
Author: Mohammad Hossain
Publisher: LAP Lambert Academic Publishing
ISBN: 9783838360164
Category :
Languages : en
Pages : 200
Book Description
This investigation is focused on the evaluation of stress corrosion cracking (SCC), localized corrosion, and hydrogen embrittlement (HE) susceptibility of martensitic Alloy EP-823 in neutral and acidic solutions at ambient and elevated temperatures. While no failures were observed in smooth specimens in the neutral solution, failures were noticed in the 90 C acidic solution at constant-load (CL) leading to a threshold stress ( th) of 102 ksi. The presence of a notch reduced the th value to 91 ksi in a similar environment. The ductility (%El and %RA), time-to-failure (TTF), and true failure stress ( f) were gradually reduced in both environments with increasing temperature during SSR testing. The presence of a notch, however, enhanced the f value. All polarized specimens exhibited localized attack. The application of a controlled cathodic potential further reduced the ductility, TTF and of showing the characteristics of more brittle failures. Metallographic and fractographic evaluations revealed secondary cracks along the gage section, and combination of ductile and brittle failures at the primary fracture face, respectively."
Publisher: LAP Lambert Academic Publishing
ISBN: 9783838360164
Category :
Languages : en
Pages : 200
Book Description
This investigation is focused on the evaluation of stress corrosion cracking (SCC), localized corrosion, and hydrogen embrittlement (HE) susceptibility of martensitic Alloy EP-823 in neutral and acidic solutions at ambient and elevated temperatures. While no failures were observed in smooth specimens in the neutral solution, failures were noticed in the 90 C acidic solution at constant-load (CL) leading to a threshold stress ( th) of 102 ksi. The presence of a notch reduced the th value to 91 ksi in a similar environment. The ductility (%El and %RA), time-to-failure (TTF), and true failure stress ( f) were gradually reduced in both environments with increasing temperature during SSR testing. The presence of a notch, however, enhanced the f value. All polarized specimens exhibited localized attack. The application of a controlled cathodic potential further reduced the ductility, TTF and of showing the characteristics of more brittle failures. Metallographic and fractographic evaluations revealed secondary cracks along the gage section, and combination of ductile and brittle failures at the primary fracture face, respectively."
Stress Corrosion Cracking and Hydrogen Embrittlement of Martensitic Alloy EP-823
Author: Mohammad Kamal Hossain
Publisher:
ISBN:
Category :
Languages : en
Pages : 356
Book Description
Publisher:
ISBN:
Category :
Languages : en
Pages : 356
Book Description
Hydrogen Embrittlement and Stress Corrosion Cracking
Author: Alexander Robert Troiano
Publisher: ASM International
ISBN: 9781615031788
Category : Technology & Engineering
Languages : en
Pages : 356
Book Description
Publisher: ASM International
ISBN: 9781615031788
Category : Technology & Engineering
Languages : en
Pages : 356
Book Description
Stress-corrosion Cracking and Hydrogen-stress Cracking of High-strength Steel
Author: Ellis E. Fletcher
Publisher:
ISBN:
Category : Metals
Languages : en
Pages : 28
Book Description
High-strength steels are susceptible to delayed cracking under suitable conditions. Frequently such a brittle failure occurs at a stress that is only a fraction of the nominal yield strength. Considerable controversy exists over whether such failures result from two separate and distinct phenomena or whether there is but one mechanism called by two different names. Stress-corrosion cracking is the process in which a crack propagates, at least partially, by the stress induced corrosion of a susceptible metal at the advancing tip of the stress-corrosion crack. There is considerable evidence that this cracking results from the electrtrochemical corrosion of a metal subjected to tensile stresses, either residual or externally applied. Hydrogen-stress cracking is cracking which occurs as the result of hydrogen in the metal lattice in combination with tensile stresses. Hydrogen-stress cracking cannot occur if hydrogen is prevented from entering the steel, or if hydrogen that has entered during processing or service is removed before permanent damage has occurred. It is generally agreed that corrosion plays no part in the actual fracture mechanism. This report was prepared to point out wherein the two fracture mechanisms under consideration are similar and wherein they differ. From the evidence available today, the present authors have concluded that there are two distinct mechansims of delayed failure. (Author).
Publisher:
ISBN:
Category : Metals
Languages : en
Pages : 28
Book Description
High-strength steels are susceptible to delayed cracking under suitable conditions. Frequently such a brittle failure occurs at a stress that is only a fraction of the nominal yield strength. Considerable controversy exists over whether such failures result from two separate and distinct phenomena or whether there is but one mechanism called by two different names. Stress-corrosion cracking is the process in which a crack propagates, at least partially, by the stress induced corrosion of a susceptible metal at the advancing tip of the stress-corrosion crack. There is considerable evidence that this cracking results from the electrtrochemical corrosion of a metal subjected to tensile stresses, either residual or externally applied. Hydrogen-stress cracking is cracking which occurs as the result of hydrogen in the metal lattice in combination with tensile stresses. Hydrogen-stress cracking cannot occur if hydrogen is prevented from entering the steel, or if hydrogen that has entered during processing or service is removed before permanent damage has occurred. It is generally agreed that corrosion plays no part in the actual fracture mechanism. This report was prepared to point out wherein the two fracture mechanisms under consideration are similar and wherein they differ. From the evidence available today, the present authors have concluded that there are two distinct mechansims of delayed failure. (Author).
Stress Corrosion Cracking and Hydrogen Embrittlement of Iron Base Alloys
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 1256
Book Description
Publisher:
ISBN:
Category :
Languages : en
Pages : 1256
Book Description
Stress-corrosion Cracking in High Strength Steels and in Titanium and Aluminum Alloys
Author: Benjamin Floyd Brown
Publisher:
ISBN:
Category : Aluminum alloys
Languages : en
Pages : 390
Book Description
Publisher:
ISBN:
Category : Aluminum alloys
Languages : en
Pages : 390
Book Description
STRESS CORROSION CRACKING AND HYDROGEN EMBRITTLEMENT OF IRON BASE ALLOYS- PROCEEDINGS OF A CONFERENCE- NATIONAL ASSOCIATION OF CORROSION ENGINEERS.
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
Publisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
Hydrogen Embrittlement and Stress Corrosion Cracking
Author: R. Gibala
Publisher:
ISBN:
Category :
Languages : en
Pages : 324
Book Description
Publisher:
ISBN:
Category :
Languages : en
Pages : 324
Book Description
Environmental and Metallurgical Factors of Stress-corrosion Cracking in High-strength Steels
Author: C. J. Slunder
Publisher:
ISBN:
Category : Steel, High strength
Languages : en
Pages : 50
Book Description
Publisher:
ISBN:
Category : Steel, High strength
Languages : en
Pages : 50
Book Description
Hydrogen Degradation of Ferrous Alloys
Author: Richard A. Oriani
Publisher: William Andrew
ISBN:
Category : Technology & Engineering
Languages : en
Pages : 920
Book Description
Publisher: William Andrew
ISBN:
Category : Technology & Engineering
Languages : en
Pages : 920
Book Description