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Title: FORGING CHARACTERISTICS AND PROPERTIES OF HM21XA AND EK31XA MAGNESIUM ALLOY PRODUCTION FORGINGS. Period covered : May 16, 1957 to June 30, 1958

Abstract

This production closed-die forging program was established for the purpose of determining the forging characteriatics and properties of two high- temperature magnesium alloys, HM21XA and EK31XA, in five sets of commercial design tools. Both cast and extruded material was used as forging stock. Teat specimens for room and elevated temperature testing were taken from the forgings in normal production test locations after the HM21XA forgings were aged to the - T5 temper and the EK31XA forgings were heat treated to the -T6 condition. EK31XA alloy is readily forgeable in regular hydraulic presses and the Air Force heavy presses with stock temperatures of 750 to 950 deg F and die temperatures of 700 to 850 deg F. HM21XA alloy is relatively stiff to forge in this temperature range and the alley is also susceptible to cracking when subjected to bending moments during the forging cycle. The cast forms of both alloys are slightly stiffer to forge than the extruded forms. The strength properties and creep resistance of EK3lXA,-T6 production forgings are outstanding st temperatures to 500 deg F. Properties of HM21XA-T5 forgings, although lower than anticipated st moderste temperatures, duplicate those obtained on laboratory muterial at the higher testing temperatures. Optimummore » properties are obtained in this alloy by strain hardering and maintaining the Mn content at about 0.60%. Modulus, shear, bearing, and fatigue properties for both alloys are presented at appropriate testing temperatures. (auth)« less

Authors:
Publication Date:
Research Org.:
Dow Chemical Co., Midland, Mich.
OSTI Identifier:
4276175
Report Number(s):
WADC-TR-58-218; AD-204797
NSA Number:
NSA-13-005582
DOE Contract Number:  
AF33-(616)-3578
Resource Type:
Technical Report
Resource Relation:
Other Information: Project title: METALLIC MATERIALS. Task title: IMPROVED MAGNESIUM ALLOYS. Orig. Receipt Date: 31-DEC-59
Country of Publication:
United States
Language:
English
Subject:
METALLURGY AND CERAMICS; CASTING; CRACKS; CREEP; DEFORMATION; EFFICIENCY; ELASTICITY; EXTRUSION; FATIGUE; FORGING; HEAT TREATMENTS; HIGH TEMPERATURE; HYDRAULICS; MAGNESIUM ALLOYS; MATERIALS TESTING; PLANNING; PRESSURE; SHEAR; STABILITY; TEMPERATURE; TEMPERING; TENSILE PROPERTIES; TOOLS

Citation Formats

Pashak, J.F. FORGING CHARACTERISTICS AND PROPERTIES OF HM21XA AND EK31XA MAGNESIUM ALLOY PRODUCTION FORGINGS. Period covered : May 16, 1957 to June 30, 1958. United States: N. p., 1958. Web.
Pashak, J.F. FORGING CHARACTERISTICS AND PROPERTIES OF HM21XA AND EK31XA MAGNESIUM ALLOY PRODUCTION FORGINGS. Period covered : May 16, 1957 to June 30, 1958. United States.
Pashak, J.F. Sun . "FORGING CHARACTERISTICS AND PROPERTIES OF HM21XA AND EK31XA MAGNESIUM ALLOY PRODUCTION FORGINGS. Period covered : May 16, 1957 to June 30, 1958". United States. doi:.
@article{osti_4276175,
title = {FORGING CHARACTERISTICS AND PROPERTIES OF HM21XA AND EK31XA MAGNESIUM ALLOY PRODUCTION FORGINGS. Period covered : May 16, 1957 to June 30, 1958},
author = {Pashak, J.F.},
abstractNote = {This production closed-die forging program was established for the purpose of determining the forging characteriatics and properties of two high- temperature magnesium alloys, HM21XA and EK31XA, in five sets of commercial design tools. Both cast and extruded material was used as forging stock. Teat specimens for room and elevated temperature testing were taken from the forgings in normal production test locations after the HM21XA forgings were aged to the - T5 temper and the EK31XA forgings were heat treated to the -T6 condition. EK31XA alloy is readily forgeable in regular hydraulic presses and the Air Force heavy presses with stock temperatures of 750 to 950 deg F and die temperatures of 700 to 850 deg F. HM21XA alloy is relatively stiff to forge in this temperature range and the alley is also susceptible to cracking when subjected to bending moments during the forging cycle. The cast forms of both alloys are slightly stiffer to forge than the extruded forms. The strength properties and creep resistance of EK3lXA,-T6 production forgings are outstanding st temperatures to 500 deg F. Properties of HM21XA-T5 forgings, although lower than anticipated st moderste temperatures, duplicate those obtained on laboratory muterial at the higher testing temperatures. Optimum properties are obtained in this alloy by strain hardering and maintaining the Mn content at about 0.60%. Modulus, shear, bearing, and fatigue properties for both alloys are presented at appropriate testing temperatures. (auth)},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Sun Jun 15 00:00:00 EDT 1958},
month = {Sun Jun 15 00:00:00 EDT 1958}
}

Technical Report:
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