Author: Jason William Reinhart
Publisher: Library and Archives Canada = Bibliothèque et Archives Canada
ISBN:
Category : Pipelines
Languages : en
Pages : 410
Book Description
Dynamic Fracture Toughness Measurements in X70 & X80 Steels [microform]
Author: Jason William Reinhart
Publisher: Library and Archives Canada = Bibliothèque et Archives Canada
ISBN:
Category : Pipelines
Languages : en
Pages : 410
Book Description
Publisher: Library and Archives Canada = Bibliothèque et Archives Canada
ISBN:
Category : Pipelines
Languages : en
Pages : 410
Book Description
Dynamic Fracture Toughness Measurements in X70 & X80 Steels
Author: Jason William Reinhart
Publisher:
ISBN:
Category : Pipelines
Languages : en
Pages : 410
Book Description
Publisher:
ISBN:
Category : Pipelines
Languages : en
Pages : 410
Book Description
Dynamic Fracture Toughness Measurements of Tough Ductile Steels
Dynamic Fracture Toughness Measurements of High-Strength Steels Using Precracked Charpy Specimens
Author: TJ. Koppenaal
Publisher:
ISBN:
Category : Composite materials
Languages : en
Pages : 26
Book Description
The dynamic fracture toughness, KId, was measured in a number of ferrous alloys using precracked Charpy specimens and an instrumented impact machine. The alloys investigated included quenched and tempered steels (H-11, D6AC, and 4340), 18Ni maraging steels (grades 200, 250, and 300) and a high-temperature, stainless maraging steel (Pyromet X-15). Standard Charpy specimens were precracked in fatigue and tested at either 72°F (22°C) or -65°F (-54°C). Values of KId, were determined as a function of yield strength and microstructure, and correlations were established between KId and both the energy to initiate fracture, Wm/A, and the total energy of fracture, W/A. The instrumented, precracked Charpy test is shown to be a convenient method of determining relative fracture toughness; under proper conditions this test procedure can be used to determine the dynamic planestrain fracture toughness.
Publisher:
ISBN:
Category : Composite materials
Languages : en
Pages : 26
Book Description
The dynamic fracture toughness, KId, was measured in a number of ferrous alloys using precracked Charpy specimens and an instrumented impact machine. The alloys investigated included quenched and tempered steels (H-11, D6AC, and 4340), 18Ni maraging steels (grades 200, 250, and 300) and a high-temperature, stainless maraging steel (Pyromet X-15). Standard Charpy specimens were precracked in fatigue and tested at either 72°F (22°C) or -65°F (-54°C). Values of KId, were determined as a function of yield strength and microstructure, and correlations were established between KId and both the energy to initiate fracture, Wm/A, and the total energy of fracture, W/A. The instrumented, precracked Charpy test is shown to be a convenient method of determining relative fracture toughness; under proper conditions this test procedure can be used to determine the dynamic planestrain fracture toughness.
Dynamic Fracture Toughness Measurements of Low Alloy Steel Castings
Dynamic Fracture Toughness: Papers
Author: Welding Institute
Publisher:
ISBN:
Category : Fracture mechanics
Languages : en
Pages : 364
Book Description
Publisher:
ISBN:
Category : Fracture mechanics
Languages : en
Pages : 364
Book Description
Dynamic Fracture Toughness Measurements in the Ductile-to- Brittle Region Using Small Specimens
Author: RE. Link
Publisher:
ISBN:
Category : Constraint
Languages : en
Pages : 21
Book Description
The dynamic fracture toughness of a reactor pressure vessel steel was investigated using small specimens. Precracked Charpy-size SE(B) specimens and circumferentially cracked round bars (CRB) loaded in tension were used to investigate the dynamic fracture toughness of an A533, Gr. B steel plate within the ductile-brittle transition region. The specimens used in this investigation were removed from the broken halves of conventional 4T C(T) specimens that had been utilized in a previous investigation of the dynamic fracture toughness of this material. Crack-tip loading rates in excess of 104 MPa-m1/2/s were achieved in the current tests. Multiple specimens were tested at each temperature in order to permit the determination of the reference temperature, T0. A fracture toughness scaling model for the circumferentially cracked round bar developed by Sciabetta was used to account for the loss of constraint in this specimen. A master curve approach was used to characterize the dynamic toughness in the ductile-brittle region. The shift in transition temperature was compared to a model for the strain rate dependence of T0 developed by Wallin. The shift in transition temperature of the CRB specimen was accurately predicted by the model. The CRB specimen and the dynamic SE(B) specimens gave good results considering the material inhomogeneity typical of the plate tested.
Publisher:
ISBN:
Category : Constraint
Languages : en
Pages : 21
Book Description
The dynamic fracture toughness of a reactor pressure vessel steel was investigated using small specimens. Precracked Charpy-size SE(B) specimens and circumferentially cracked round bars (CRB) loaded in tension were used to investigate the dynamic fracture toughness of an A533, Gr. B steel plate within the ductile-brittle transition region. The specimens used in this investigation were removed from the broken halves of conventional 4T C(T) specimens that had been utilized in a previous investigation of the dynamic fracture toughness of this material. Crack-tip loading rates in excess of 104 MPa-m1/2/s were achieved in the current tests. Multiple specimens were tested at each temperature in order to permit the determination of the reference temperature, T0. A fracture toughness scaling model for the circumferentially cracked round bar developed by Sciabetta was used to account for the loss of constraint in this specimen. A master curve approach was used to characterize the dynamic toughness in the ductile-brittle region. The shift in transition temperature was compared to a model for the strain rate dependence of T0 developed by Wallin. The shift in transition temperature of the CRB specimen was accurately predicted by the model. The CRB specimen and the dynamic SE(B) specimens gave good results considering the material inhomogeneity typical of the plate tested.
Innovative Method of Measuring Dynamic Fracture Toughness
Techniques for Dynamic Fracture Toughness Measurements
Dynamic Fracture Toughness Parameters for HY-80 and HY-130 Steels and Their Weldments
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 42
Book Description
Lower bound dynamic fracture toughness parameters for HY-80 and HY- 130 steel and their weld metals are identified. Specific values of the parameters K sub Id and K sub Im obtained from direct measurements are reported together with estimates inferred from the large body of Charpy energy, nil ductility transition temperature and dynamic tear energy measurements. The emphasis is on reasonable lower bound values at 30 F, the lowest anticipated service temperature, for use in elastodynamic analyses of crack growth initiation, propagation, and arrest in ship structures. For these conditions, it has been found that the ratio K sub Id/RHO sub Y is approximately sq root of 1 in. Consequently, HY-80 plate appears to be substantially more resistant to fracture under dynamic loading than are the other three grades examined.
Publisher:
ISBN:
Category :
Languages : en
Pages : 42
Book Description
Lower bound dynamic fracture toughness parameters for HY-80 and HY- 130 steel and their weld metals are identified. Specific values of the parameters K sub Id and K sub Im obtained from direct measurements are reported together with estimates inferred from the large body of Charpy energy, nil ductility transition temperature and dynamic tear energy measurements. The emphasis is on reasonable lower bound values at 30 F, the lowest anticipated service temperature, for use in elastodynamic analyses of crack growth initiation, propagation, and arrest in ship structures. For these conditions, it has been found that the ratio K sub Id/RHO sub Y is approximately sq root of 1 in. Consequently, HY-80 plate appears to be substantially more resistant to fracture under dynamic loading than are the other three grades examined.