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The relationship between a material’s micro-structure and physical properties was investigated during this lab. Tensile, Charpy impact, stress relaxation, and creep tests were performed on various materials including nylon 6, aluminum 2024, aluminum 7075, 1018 cold rolled steel, and 1018 hot rolled steel.
Analysis of Nylon 6 Mechanical Behaviors
Creep (left) and stress relaxation (right) in nylon 6 was observed during experimentation. Both tests were performed using an Instron machine on ASTM standard dog-bones.
Analysis of Aluminum 2024/7075 Mechanical Properties
Aluminum 2024 and 7075 dog-bones were tensile tested to determine modulus and strength characteristics. Copper solid solution strengthening in aluminum 7075 contributed to higher overall strength compared to the aluminum 2024 sample. Tensile tests of hot-rolled and cold-rolled 1018 steel was also performed to investigate the strength differences caused by different processing techniques.
Charpy Impact Tests of Steel 1018
Hot-rolled and cold-rolled 1018 steel samples were tested to determine energy absorption during impact. Samples were maintained at varying temperatures to investigate temperature-dependent properties.