Material Analysis of Austempered Ductile Iron

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Abstract:

A materials analysis was performed on a sample of austempered ductile iron ADI. This material was supplied in the heat-treated condition by a commercial producer. ADI is being examined as a potential alternate material to be used in the manufacture of muzzle brakes and other candidate weapon components. The analysis included mechanical property determination, chemical composition determination, metallographic examination, and scanning electron microscopy. The mechanical properties obtained were compared to the requirements specified on the 155-mm M284 muzzle brake drawing and the military casting specification MIL-B-12253. Based on the analysis, the ADI material examined would not be suitable as an alternate material for the muzzle brake. Furthermore, the results of the evaluation suggest that the material may not have been property heat treated for this particular application.

Author(s):
Roy, Sandra O. ; Noll, Kathryn E.
Author Organization(s):
ARMY ARMAMENT RESEARCH DEVELOPMENT AND ENGINEERING CENTER WATERVLIET NY BENET LABS
Descriptive Note:
Final rept.
Pagination:
0017

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):
ARCCB-TR-93003
Monitor Series:
ARCCB
 Subject Terms
Joint Capability Areas:
JCA_5_Command and Control; JCA_5.2_Understand; JCA_5.3_Planning; JCA_3.2_Engagement; JCA_3_Force Application; JCA_3.2.1_Kinetic Means; JCA_4.6_Engineering; JCA_6.4.1_Secure Information Exchange; JCA_8_Building Partnerships
Modernization Areas:
Microelectronics; Space
Communities of Interest:
Weapons Technologies
Descriptor(s):
*IRON ALLOYS, *DUCTILITY, SCANNING, WEAPONS, MECHANICAL PROPERTIES, TENSILE PROPERTIES, CARBON, STEEL, GUNS, MUZZLE BRAKES, CASTING ALLOYS, NOTCH TOUGHNESS, WEAR RESISTANCE, METALLOGRAPHY, HARDNESS, CHEMICAL ANALYSIS, DISTORTION, CHARPY IMPACT TESTS, FRACTURE(MECHANICS), AUSTENITE, QUENCHING, HEAT TREATMENT, ELECTRON MICROSCOPY, HIGH STRENGTH, SILICON
Field(s)/Group(s):
Properties of Metals and Alloys, Guns, Thermodynamics
Keyword(s):
*AUSTEMPERED, AUSTENITIZING, M284 MUZZLE BRAKES
Report Date:
1992 Jan 01