Accession Number:

ADA029658

Title:

The Prevention of Hydrogen-Induced Cracking in HY-130 Weldments.

Descriptive Note:

Progress rept. for the year ending 1 Jul 76.

Corporate Author:

RENSSELAER POLYTECHNIC INST TROY N Y

Personal Author(s):

Report Date:

1976-01-01

Pagination or Media Count:

16.0

Abstract:

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.

Subject Categories:

  • Metallurgy and Metallography
  • Couplers, Fasteners and Joints

Distribution Statement:

APPROVED FOR PUBLIC RELEASE