Author: H. H. Johnson
Publisher:
ISBN:
Category :
Languages : en
Pages : 39
Book Description
The role of water and water vapor in promoting stable crack extension and delays failure in high-strength steel was investigated within the framework of fracture mechanics. The resistance method was utilized to steady the initiation and growth of cracks in center-notched pre-cracked sheet specimens of H-11 steel at 230,000 psi strength level. The stress field parameter Ki at crack initiation was controlled by the environment; the crack extension rate was controlled by the environment and the instantaneous value of the stress field parameter K. Stable crack extension was absent in a purified argon environment; with relative humidities less than approximately 60%, the crack extension rate was insensitive to temperature but increased with relative humidity and stress field parameter. (Author).
Environment and Fracture of High Strength Steel
Author: H. H. Johnson
Publisher:
ISBN:
Category :
Languages : en
Pages : 39
Book Description
The role of water and water vapor in promoting stable crack extension and delays failure in high-strength steel was investigated within the framework of fracture mechanics. The resistance method was utilized to steady the initiation and growth of cracks in center-notched pre-cracked sheet specimens of H-11 steel at 230,000 psi strength level. The stress field parameter Ki at crack initiation was controlled by the environment; the crack extension rate was controlled by the environment and the instantaneous value of the stress field parameter K. Stable crack extension was absent in a purified argon environment; with relative humidities less than approximately 60%, the crack extension rate was insensitive to temperature but increased with relative humidity and stress field parameter. (Author).
Publisher:
ISBN:
Category :
Languages : en
Pages : 39
Book Description
The role of water and water vapor in promoting stable crack extension and delays failure in high-strength steel was investigated within the framework of fracture mechanics. The resistance method was utilized to steady the initiation and growth of cracks in center-notched pre-cracked sheet specimens of H-11 steel at 230,000 psi strength level. The stress field parameter Ki at crack initiation was controlled by the environment; the crack extension rate was controlled by the environment and the instantaneous value of the stress field parameter K. Stable crack extension was absent in a purified argon environment; with relative humidities less than approximately 60%, the crack extension rate was insensitive to temperature but increased with relative humidity and stress field parameter. (Author).
The Effect of Environment on the Fracture of a High Strength Steel, H-11
Author: André Maurice Willner
Publisher:
ISBN:
Category : Steel
Languages : en
Pages : 182
Book Description
Publisher:
ISBN:
Category : Steel
Languages : en
Pages : 182
Book Description
An Experimental Study of the Environmentally Affected Fracture of Two High-strength Steels, AM 350 and H-11
Author: Gustavus Graham Hancock
Publisher:
ISBN:
Category : Steel
Languages : en
Pages : 154
Book Description
Publisher:
ISBN:
Category : Steel
Languages : en
Pages : 154
Book Description
Fatigue-environmental Crack Propagation in a High Strength Steel
Author: Thomas Charles Babcock
Publisher:
ISBN:
Category : Fracture mechanics
Languages : en
Pages : 166
Book Description
Publisher:
ISBN:
Category : Fracture mechanics
Languages : en
Pages : 166
Book Description
Environmental and Micro-structural Effects on the Fracture Toughness of Two High Strength Steels in Monolithic and Composite Form
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
Environment-sensitive Fracture of Engineering Materials
Author: Z. A. Foroulis
Publisher: Society for Mining Metallurgy & Exploration
ISBN:
Category : Technology & Engineering
Languages : en
Pages : 680
Book Description
Publisher: Society for Mining Metallurgy & Exploration
ISBN:
Category : Technology & Engineering
Languages : en
Pages : 680
Book Description
Mechanical Restraint, Hydrogen Gas, and Brittle Fracture of a High Strength Steel
Author: Brian Foster Rowe
Publisher:
ISBN:
Category : Steel
Languages : en
Pages : 138
Book Description
Publisher:
ISBN:
Category : Steel
Languages : en
Pages : 138
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).
Environment-sensitive Fracture
Author: S. W. Dean
Publisher: ASTM International
ISBN: 9780803102644
Category : Technology & Engineering
Languages : en
Pages : 569
Book Description
Publisher: ASTM International
ISBN: 9780803102644
Category : Technology & Engineering
Languages : en
Pages : 569
Book Description