Effects Of Surface Environments On The Mechanical Behavior Of Metals

Item

Title
Effects Of Surface Environments On The Mechanical Behavior Of Metals
Date
1962
Index Abstract
Coming Soon
Photo Quality
Not Needed
Report Number
ASD TDR 62-99
Creator
Kramer, I.R.
Corporate Author
Martin Co Baltimore MD
Laboratory
Directorate of Materials and Processes
Extent
56
Identifier
AD0285567
Access Rights
OTS
Distribution Classification
1
Contract
AF 33(616)-7976
DoD Project
7353 - Characterization of Solid Phase and Interphase Phenomena in Crystalline Structures
DoD Task
735303
DTIC Record Exists
No
Distribution Change Authority Correspondence
None
Distribution Conflict
No
Abstract
A study of the mechanical behavior of Cu single crystals in solutions containing surface-active agents shows that the weakening effect is associated with the formation and solution of metallic soaps. A large change in the stressstrain characteristics of polycrystalline Al alloys was found when the surface of the specimens was removed during plastic deformation. Studies of the effect of size of the specimen on the changes of slopes of Stages I and II by surface removal showed that the change of the slope of Stage I was independent of size with respect to the polishing rate; however, the change in the slope of Stage II with polishing rate increased directly in proportion to surface area or cross section. A surface removal treatment on single crystals eliminated the yield point, wherease the same type of treatment enhanced the yield point drop on Al alloys. Measurements of slipband spacing indicate that surface treatment affects the egress of dislocations.
Report Availability
Full text available
Date Issued
1962-08
Provenance
Lockheed Martin Missiles & Fire Control
Type
report
Format
1 online resource
Media
ASDTDR62-099.pdf