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Comparing the Mechanical Properties for an Al Alloy in the Cast and Wrought Condition using the Identical Solid Model Dr. Richard B. Griffin and Dr. Reza Rowshan Mechanical Engineering Texas A&M University at Qatar Doha, Qatar

Abstract Junior level mechanical engineering students’ have designed, rapid prototyped, cast, and tested a link in the laboratory portion of a materials and manufacturing course. A portion of this activity was described originally in a 2005 ASEE Conference paper. The activity has been used for several years in the laboratory portion of the course and it has been very successful. However, one question that comes to mind is May we compare cast mechanical properties with those of wrought properties for similar alloys. During lecture, comparisons of wrought and cast properties are frequently made, and it is shown that ratio of wrought to cast properties is frequently greater than one. To date, the direct comparison has not been done in this course. Using the student designed solid models, it is possible to directly make a rapid prototype part that can be used for the mold in a casting process, and that same model may be used in a CNC machine to make a similar part. Alloy 6061 was used to make the cast links and a section from the five inch diameter ingot will be used to make the CNC produced link. Mechanical properties will be measured using a universal testing machine. The results will be compared, and student interpretation of the results will be evaluated.

Introduction In fall 2003, Texas A&M University at Qatar (TAMUQ) started an engineering program in Doha, Qatar under the auspices of Texas A&M University College Station and funded through the Qatar Foundation. The University has four engineering programs, which are Chemical, Electrical, Mechanical, and Petroleum Engineering. The initial group of engineers graduated in 2008. In steady state Texas A&M at Qatar is expected to have between 400 to 500 students enrolled in the four programs. Currently Mechanical Engineering has 67 students enrolled.

TAMUQ follows the mechanical engineering curriculum at the College Station campus. Currently, the program has nine faculty members, and plans are to hire several more within the next couple of years. Currently, our upper division classes have only been taught two or three times. The laboratory facilities were completed and available for use in fall 2007. The initial ABET review took place during fall 2008.

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Griffin, R., & Rowshan, R. (2009, June), Modeling, Rapid Prototyping, Casting, Cnc Producing, And Comparing The Mechanical Properties Paper presented at 2009 Annual Conference & Exposition, Austin, Texas. 10.18260/1-2--5873