The Bauschinger Effect in 6-6-2 Titanium Alloy and Its Influence on Advanced Artillery Projectiles

reportActive / Technical Report | Accession Number: ADA209355 | Open PDF

Abstract:

The Bauschinger effect may be defined as a phenomenon by which plastic deformation of a polycrystalline material causes a reduction in yield strength upon reloading in a direction opposite to the original direction. This characteristic of plastic flow results from the inhomogeneity of plastic flow on the microscopic level. In this report, the Bauschinger effect in 6-6-2 titanium alloy is evaluated and an illustration is given to demonstrate its importance in the design and reliability of the Armys advanced artillery projectiles. The tension-compression specimens, fabricated from the recovered projectiles, are loaded to compression to a specified plastic range, followed by tension after unloading. The experimental results indicate that the original yield strength of the material is greatly reduced due to reverse loading. Keywords Titanium alloys Aluminumvanadiumtin XM-785 projectiles.

Author(s):
Ray, Hemen
Author Organization(s):
ARMY LAB COMMAND WATERTOWN MA MATERIAL TECHNOLOGY LAB
Descriptive Note:
Final rept.
Pagination:
0039

Security Markings

DOCUMENT & CONTEXTUAL SUMMARY

Distribution:
Approved For Public Release
Distribution Statement:
Approved For Public Release; Distribution Is Unlimited.

RECORD

Collection: TR
Identifying Numbers
Report Number(s):
MTL-TR-89-39
Monitor Series:
MTL
 Subject Terms
Joint Capability Areas:
JCA_3.2_Engagement; JCA_3_Force Application; JCA_3.2.1_Kinetic Means; JCA_7.2.1_Mitigate Lethal Effects; JCA_7.2_Mitigate; JCA_7_Protection; JCA_5_Command and Control; JCA_5.2_Understand; JCA_4.6_Engineering
Modernization Areas:
Space
Communities of Interest:
Weapons Technologies
Descriptor(s):
*PLASTIC DEFORMATION, *POLYCRYSTALLINE, *PLASTIC PROPERTIES, *PROJECTILES, RELIABILITY, COMPRESSION, REVERSIBLE, TENSION, HETEROGENEITY, VANADIUM, TIN, YIELD STRENGTH, ARMY, ARTILLERY, ADVANCED WEAPONS, TITANIUM ALLOYS, ARTILLERY AMMUNITION, PLASTIC FLOW, MATERIALS, UNLOADING, ALUMINUM
Field(s)/Group(s):
Properties of Metals and Alloys, Ammunition and Explosives
Keyword(s):
*BAUSCHINGER EFFECT, *XM 785 PROJECTILES
Report Date:
1989 Apr 01