Study Of The Effect Of Melting Practice On The Fatigue Behavior Of High-Strength Steel

Item

Title
Study Of The Effect Of Melting Practice On The Fatigue Behavior Of High-Strength Steel
Date
1961
Index Abstract
Coming Soon
Photo Quality
Not Needed
Report Number
ASD TR 61-296
Creator
Nudelman, Harvey B.
Sheehan, John
Corporate Author
Armour Research Foundation of Illinois Institute of Technology
Laboratory
Directorate of Materials & Processes
Extent
75
Identifier
AD0271503
Access Rights
OTS
Distribution Classification
1
Contract
AF 33(616)-6290
DoD Project
7381
DoD Task
73812
DTIC Record Exists
No
Distribution Change Authority Correspondence
None
Abstract
Special C-Al deoxidation practice provided a significant increase in the fatigue properties of an induction-melted Ni-Mo high-strength steel. Prot evaluation of cylindrical R. R. Moore fatigue specimens gave E sub p/UTS ratios of 0.500 and 0.555 at ultimate tensile strength levels of 274 and 200 ksi respectively. Vacuum arc and vacuum induction remelting of the specially deoxidized material reduced the fatigue strength to lower values than that characteristic of standard melting practice. The fatigue properties of vacuum-melted high-purity raw materials were inferior to those prepared by induction melting. The harmful effect of Si additions on the fatigue properties of these steels was related to the sequence of addition; the damage was minimized by adding the Si after the completion of the Al killing treatment. Ni-Mo steels were prepared by standard practice and special C-Al practice and tested in axial fatigue in the notched and unnotched conditions. The resultant scatter was too great to indicate any definite trends.
Report Availability
Full text available
Corporate Report Number
ARF 2172-22
Date Issued
1961-11
Provenance
Lockheed Martin Missiles & Fire Control
Type
report
Format
1 online resource
Item sets
Illinois Tech Related
Media
ASDTR61-296.pdf