SUBJECT MATTER: Temperature-dependent effect tests upon AISI 1018 steel and 6061 Aluminum

Purpose

This kind of lab was performed to totally comprehend the temperature habbit of the crack toughness of the Aluminum and Steel. It absolutely was also carried out to discover the ductile-brittle transition of every.

Summary

The experiment solidified the hypothesis that the 6061 aluminum is without ductile-to-brittle move do to its FCC crystal structure. The 1018 steel provides a ductile-to-brittle move temperature of -31ВєC due to its BCC ravenscroft structure.

Results

Table you: Test temperature ranges and common fracture powers with mistakes for Group 4 and whole class |CLASS | |6061 Aluminum |1018 Steel | |Temperature(В°C) |Fracture Energy(J) |Temperature(В°C) |Fracture Energy(J) | |Mean

-28. 5 |0. 4 |5. 2 |0. 05 |-70. 5 |0. 2 |2. 6 |0. 03 | |-0. being unfaithful |0. 7 |4. five |0. 05 |-35. 2 |0. six |14. your five |0. 15 | |3. 2 |0. 5 |5. 6 |0. 06 |-15. 3 |0. 4 |17. 1 |0. 17 | |25. 1 |0. 05 |4. 6 |0. 05 |26 |0. 05 |35. 2 |0. 35 | | [pic] Figure one particular: Graph of fracture energy vs . heat for entire class data

From Physique 1 one can determine that steel provides a ductile-to-brittle transition temperature at -31ВєC requiring a large increase in energy required to fracture within the temperature range. Also it can become determined that aluminum does not have ductile to brittle transition due to the practically nonexistent enhancements made on fracture energy over the heat range. Number 2: Photos of the break of each specimen for each tests temperature

From the photos in Figure 2 one can notice that the Aluminium...

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