Failures Of The M72A2 Law Rocket System
Report Number: AFWAL-TR-81-4019 Volume II p. 329-343
Author(s): Bruggeman, G. A.
Corporate Author(s): Army Materials and Mechanics Research Center
Laboratory: Materials Laboratory
Date of Publication: 1980-11
Pages: 15
DoD Task:
Identifier: This paper is part of a conference proceedings. See ADA115875
Abstract:
Over a period of several years, the M72A2 LAW Rocket has experienced a number of malfunctions traceable to failures of either the rocket motor closure or the rocket motor itself. Both of these components are made of 7001 aluminum alloy heat treated to the T6 temper, an alloy known to possess low fracture toughness properties and also to be highly susceptible to stress corrosion cracking. The role of stress corrosion in a number of these malfunctions is discussed, and the remedies chosen to alleviate each problem as it occurred are described. Comparisons are made between the mechanical and physical properties of material from production lots manufactured during different time periods, and comments are made regarding factors that would appear to be contributing to the on-going stress corrosion problem.
Author(s): Bruggeman, G. A.
Corporate Author(s): Army Materials and Mechanics Research Center
Laboratory: Materials Laboratory
Date of Publication: 1980-11
Pages: 15
DoD Task:
Identifier: This paper is part of a conference proceedings. See ADA115875
Abstract:
Over a period of several years, the M72A2 LAW Rocket has experienced a number of malfunctions traceable to failures of either the rocket motor closure or the rocket motor itself. Both of these components are made of 7001 aluminum alloy heat treated to the T6 temper, an alloy known to possess low fracture toughness properties and also to be highly susceptible to stress corrosion cracking. The role of stress corrosion in a number of these malfunctions is discussed, and the remedies chosen to alleviate each problem as it occurred are described. Comparisons are made between the mechanical and physical properties of material from production lots manufactured during different time periods, and comments are made regarding factors that would appear to be contributing to the on-going stress corrosion problem.