1. Bending of Cold Worked Mild Steel Due to Different Welding Processes Josh Kelly and Matt Lewis ENGR 45 SRJC Fall ‘05

2. Preparation & Material Used Tinius Olsen Tensile Machine Tinius Olsen Tensile Machine Cold Worked Mild Steel 3/8 x 3 x 6 in. Cold Worked Mild Steel 3/8 x 3 x 6 in.

3. Welding Processes Arc Arc MIG MIG Dual Shield Dual Shield

4. Arc Welding E-7024 Rod E-7024 Rod AC @ 135 Amps AC @ 135 Amps 70,000 lb Tensile Material ESI 70,000 lb Tensile Material ESI

5. MIG Metal inert gas (MIG) 25% CO 2 75% Argon Gas Metal inert gas (MIG) 25% CO 2 75% Argon Gas 0.035 wire, 70 volts, 140 amps DC+ 0.035 wire, 70 volts, 140 amps DC+ 70,000 lb Tensile Material ESI 70,000 lb Tensile Material ESI

6. Self-shielded Flux-Cored Arc- Welding (Dual Shield) 0.045 Wire, 23 volts, 175 Amps DC+ 0.045 Wire, 23 volts, 175 Amps DC+ 70,000 lb Tensile Material ESI 70,000 lb Tensile Material ESI

7. Flexural Strength vs. Deflection Flex. Strength = 3 * Force * Length 2 * Width * height 2 Heat Relief @ 400 Degrees F for 2.5 hours Heat Relief @ 400 Degrees F for 2.5 hours

8. Flexural Strength vs. Deflection Flex. Strength = 3 * Force * Length 2 * Width * height 2 Focus on elastic region

9. Flexural Strength vs. Deflection Heating To Relieve Stress

10. Flexural Strength vs. Deflection Heating To Relieve Stress-Arc Welding

11. Flexural Strength vs. Deflection Heating To Relieve Stress-Dual Shield Welding

12. Flexural Strength vs. Deflection Heating To Relieve Stress-MIG Welding

13. Conclusions Stress relief affected samples differently Stress relief affected samples differently Hardness not a factor since all same material Hardness not a factor since all same material Flexural strength did not change due to the type of weld used on sample Flexural strength did not change due to the type of weld used on sample

14. References http://www.lincolnelectric.com/knowledge/articles/content/arcweldfund.asp http://www.lincolnelectric.com/knowledge/articles/content/arcweldfund.asp http://www.lincolnelectric.com/knowledge/articles/content/arcweldfund.asp http://www.alu-info.dk/Html/alulib/modul/A00526.htm http://www.alu-info.dk/Html/alulib/modul/A00526.htm http://www.alu-info.dk/Html/alulib/modul/A00526.htm http://en.wikipedia.org/wiki/Welding http://en.wikipedia.org/wiki/Welding http://en.wikipedia.org/wiki/Welding http://www.lincolnelectric.com/knowledge/articles/content/hypipe3.asp http://www.lincolnelectric.com/knowledge/articles/content/hypipe3.asp http://www.lincolnelectric.com/knowledge/articles/content/hypipe3.asp http://www.engineersedge.com/strength_of_materials.htm http://www.engineersedge.com/strength_of_materials.htm http://www.engineersedge.com/strength_of_materials.htm