Accession Number:

AD1018262

Title:

Evaluation and Correlation of Dynamic Flow, Failure, and Microstructural Properties of Heat-Treated 4130 Steel

Descriptive Note:

[Technical Report, Doctoral Thesis]

Corporate Author:

AFIT

Personal Author(s):

• Wuertemberger, Luke A.

Report Date:

2016-09-15

Pagination or Media Count:

217

Abstract:

An experimental program has been carried out in conjunction with the University of Dayton Research Institute tocharacterize the material constants of the Johnson-Cook constitutive and damage models, and additionally, themicrostructure of the failed specimen has been investigated to observe any association of deformation micromechanics tothe phenomenological development of the Johnson-Cook expression. An Analysis of Variance ANOVA statisticalanalysis was carried out to identify whether temperature or strain rate were signixCcant factors in causing changes tomicromechanical features, and if so, whether the micromechanical properties were related to the Johnson-Cookparameters.

Descriptors:

• mechanics
• crystal structure
• mechanical working
• modulus of elasticity
• stress strain relations
• air force
• elastic properties
• mechanical properties
• plastic properties
• crystallography
• specific heat
• tensile strength
• yield strength
• crystal lattices
• crystals
• materials
• measurement
• computational science
• ferrium
• grain boundaries

Subject Categories:

• Mechanics

Distribution Statement:

[A, Approved For Public Release]