CAUSES OF CRACKING IN HIGH-STRENGTH WELD METALS

reportActive / Technical Report | Accession Number: AD0093335 | Open PDF

Abstract:

This report summarizes the experimental work in a study to determine the causes of cracking in high-strength weld metals. A new hot-tension machine was designed and built to facilitate the testing of SAE 4340 weld metals on cooling from the molten state. The tests were conducted over the temperature range from 2600 F to 100 F. Results from the studies showed phosphorus to be detrimental to weld-metal cracking resistance. As the phosphorus was increased the ductility was lowered at temperatures near the solidus. Nitrogen content within the normal range of SAE 4340 steels appeared to have little influence on the cracking resistance of the weld deposits. Rare-earth metal additions improved the hot ductility and hot-cracking resistance of the weld metals. An increase in silicon lowered the hot ductility and hot-cracking resistance slightly.

Author(s):
Lowe Jr., A. L. ; Sopher, R. P. ; Rieppel, P. J.
Author Organization(s):
BATTELLE MEMORIAL INST COLUMBUS OH
Descriptive Note:
Rept. for 15 Nov 1954-15 Nov 1955
Supplementary Note:
DOI: 10.21236/AD0093335
Pagination:
0041

Security Markings

DOCUMENT & CONTEXTUAL SUMMARY

Distribution:
Approved For Public Release

RECORD

Collection: TR
Identifying Numbers
Report Number(s):
WADC-TR-52-322-PT-4
Contract/Grant Number(s):
AF 33(616)2734
Monitor Series:
TR-52-322-PT-4, WADC
 Subject Terms
Joint Capability Areas:
JCA_5_Command and Control; JCA_5.3_Planning; JCA_1.2_Force Preparation; JCA_1_Force Support
Communities of Interest:
Advanced Electronics
Descriptor(s):
*METALS, *WELDS, HIGH TEMPERATURE, CRACKING(FRACTURING), WELD METAL, SURFACE PROPERTIES, HIGH STRENGTH, DUCTILITY, RARE EARTH COMPOUNDS, PHOSPHORUS, CRAZING
Field(s)/Group(s):
Fabrication Metallurgy, Couplers, Fasteners and Joints
Keyword(s):
STEEL 4340
Report Date:
1955 Nov 01