The Prevention of Hydrogen-Induced Cracking in HY-130 Weldments.
Progress rept. for the year ending 1 Jul 76.
RENSSELAER POLYTECHNIC INST TROY N Y
Pagination or Media Count:
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.
- Metallurgy and Metallography
- Couplers, Fasteners and Joints