Author: Alan J. Silvia
Publisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
Hydrogen-induced Cracking in HY-130 Steel
The Prevention of Hydrogen-Induced Cracking in HY-130 Weldments
Author: RENSSELAER POLYTECHNIC INST TROY N Y.
Publisher:
ISBN:
Category :
Languages : en
Pages : 16
Book Description
The present research has the following objectives: (1) To evaluate the interrelationship among the mechanical, metallurgical, and chemical factors responsible for hydrogen-induced cracking in HY-130 steel weldments using the Augmented Strain Cracking Test. (2) To determine the effect of preheat and interpass temperatures and times on level of hydrogen retained. (3) To study, with the aid of acoustic emission technology and both electron and optical microscopy, the mechanisms for nucleation and propagation of hydrogen-induced cracks. (4) To recommend soundly based yet practical procedures for eliminating hydrogen-induced cracking in HY-130 weldments. Testing performed to date has been restricted to a constant augmented strain of 0.5%. This level of strain produces a stress in the outer fibers slightly in excess of the yield stress. Effects of the following are discussed: Hydrogen Content; Preheat; Postheat; Hydrogen Distribution Experiments.
Publisher:
ISBN:
Category :
Languages : en
Pages : 16
Book Description
The present research has the following objectives: (1) To evaluate the interrelationship among the mechanical, metallurgical, and chemical factors responsible for hydrogen-induced cracking in HY-130 steel weldments using the Augmented Strain Cracking Test. (2) To determine the effect of preheat and interpass temperatures and times on level of hydrogen retained. (3) To study, with the aid of acoustic emission technology and both electron and optical microscopy, the mechanisms for nucleation and propagation of hydrogen-induced cracks. (4) To recommend soundly based yet practical procedures for eliminating hydrogen-induced cracking in HY-130 weldments. Testing performed to date has been restricted to a constant augmented strain of 0.5%. This level of strain produces a stress in the outer fibers slightly in excess of the yield stress. Effects of the following are discussed: Hydrogen Content; Preheat; Postheat; Hydrogen Distribution Experiments.
Hydrogen Assisted Cracking in HY-130 Steel
Prevention of Hydrogen-induced Cracking in HY-130 Weldments
An Investigation of Hydrogen Assisted Cracking in Gas Metal Arc Welds on HY-130 Steel
Use of Implant Testing to Evaluate the Susceptibility of HY-130 Steel Weldments to Hydrogen Embrittlement
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 0
Book Description
The cracking that may occur near the fusion zone of a steel weldment can often be attributed to the embrittlement of the microstructure by hydrogen induced during the welding process. The modified implant test was used in this case to evaluate the hydrogen-assisted cracking susceptibility of three separate heats of HY-130 steel, which included both cast and wrought plate. Welding was accomplished by the gas metal-arc spray transfer process. Cracking in all plates was observed to initiate and propagate in an area near the weld interface. The exact location of the fractures varied according to the amounts of diffusible hydrogen present and the type of material being tested. The effect of stress intensity together with hydrogen content on the mode of fracture present is also addressed in detail. (Author).
Publisher:
ISBN:
Category :
Languages : en
Pages : 0
Book Description
The cracking that may occur near the fusion zone of a steel weldment can often be attributed to the embrittlement of the microstructure by hydrogen induced during the welding process. The modified implant test was used in this case to evaluate the hydrogen-assisted cracking susceptibility of three separate heats of HY-130 steel, which included both cast and wrought plate. Welding was accomplished by the gas metal-arc spray transfer process. Cracking in all plates was observed to initiate and propagate in an area near the weld interface. The exact location of the fractures varied according to the amounts of diffusible hydrogen present and the type of material being tested. The effect of stress intensity together with hydrogen content on the mode of fracture present is also addressed in detail. (Author).
Hydrogenassisted Cracking in HY-130 Weldments
Author: W. F. Savage
Publisher:
ISBN:
Category :
Languages : en
Pages : 61
Book Description
The relative susceptibility to hydrogen-assisted cracking of AX-140 welds on HY-130 plate material and on AX-140 all-weld-metal specimens was investigated. Controlled amounts of diffusible hydrogen were introduced into these weldments by using the pulsed-current gas metal arc welding process with additions of hydrogen or moisture to the shielding gas. The critical hydrogen content required for crack initiation and propagation was determined by the augmented strain cracking (ASC) test. Crack initiation and propagation were monitored with acoustic-emission techniques. Although hydrogen-assisted cracking invariably initiated in the fusion zone, it frequently propagated into the heat-affected zone. Crack propagation through the weld metal was not always related to the solidification structure. The critical hydrogen content to initiate cracking in AX-140 welds on HY-130 plate was approximately 1 ppm, whereas in AX-140 welds on AX-140 all-weld-metal the critical hydrogen content was approximately 3 ppm. This difference is cracking susceptibility was ascribed to the difference between the base-metal and the fusion-zone analyses.
Publisher:
ISBN:
Category :
Languages : en
Pages : 61
Book Description
The relative susceptibility to hydrogen-assisted cracking of AX-140 welds on HY-130 plate material and on AX-140 all-weld-metal specimens was investigated. Controlled amounts of diffusible hydrogen were introduced into these weldments by using the pulsed-current gas metal arc welding process with additions of hydrogen or moisture to the shielding gas. The critical hydrogen content required for crack initiation and propagation was determined by the augmented strain cracking (ASC) test. Crack initiation and propagation were monitored with acoustic-emission techniques. Although hydrogen-assisted cracking invariably initiated in the fusion zone, it frequently propagated into the heat-affected zone. Crack propagation through the weld metal was not always related to the solidification structure. The critical hydrogen content to initiate cracking in AX-140 welds on HY-130 plate was approximately 1 ppm, whereas in AX-140 welds on AX-140 all-weld-metal the critical hydrogen content was approximately 3 ppm. This difference is cracking susceptibility was ascribed to the difference between the base-metal and the fusion-zone analyses.
Use of Implant Testing to Evaluate the Susceptibility of HY-130 Steel Weldments to Hydrogen Embrittlement
Author: Bradley J. Mason
Publisher:
ISBN:
Category : Mechanical engineering
Languages : en
Pages : 108
Book Description
The cracking that may occur near the fusion zone of a steel weldment can often be attributed to the embrittlement of the microstructure by hydrogen induced during the welding process. The modified implant test was used in this case to evaluate the hydrogen-assisted cracking susceptibility of three separate heats of HY-130 steel, which included both cast and wrought plate. Welding was accomplished by the gas metal-arc spray transfer process. Cracking in all plates was observed to initiate and propagate in an area near the weld interface. The exact location of the fractures varied according to the amounts of diffusible hydrogen present and the type of material being tested. The effect of stress intensity together with hydrogen content on the mode of fracture present is also addressed in detail. (Author).
Publisher:
ISBN:
Category : Mechanical engineering
Languages : en
Pages : 108
Book Description
The cracking that may occur near the fusion zone of a steel weldment can often be attributed to the embrittlement of the microstructure by hydrogen induced during the welding process. The modified implant test was used in this case to evaluate the hydrogen-assisted cracking susceptibility of three separate heats of HY-130 steel, which included both cast and wrought plate. Welding was accomplished by the gas metal-arc spray transfer process. Cracking in all plates was observed to initiate and propagate in an area near the weld interface. The exact location of the fractures varied according to the amounts of diffusible hydrogen present and the type of material being tested. The effect of stress intensity together with hydrogen content on the mode of fracture present is also addressed in detail. (Author).
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
Cracking Mechanisms in HY-130 Steel Weldments
Author: Alan Robert Becker
Publisher:
ISBN:
Category : Naval architecture
Languages : en
Pages : 114
Book Description
Publisher:
ISBN:
Category : Naval architecture
Languages : en
Pages : 114
Book Description