Presentation is loading. Please wait.

Presentation is loading. Please wait.

COLD WORKING EXPERIMENT # 8 Instructor: M.Yaqub. COLD WORKING  Cold working is the plastic or permanent deformation at room temperature. In this process,

Similar presentations


Presentation on theme: "COLD WORKING EXPERIMENT # 8 Instructor: M.Yaqub. COLD WORKING  Cold working is the plastic or permanent deformation at room temperature. In this process,"— Presentation transcript:

1 COLD WORKING EXPERIMENT # 8 Instructor: M.Yaqub

2 COLD WORKING  Cold working is the plastic or permanent deformation at room temperature. In this process, volume remains same.  Shape of the metals are changed by using cold working process.  After cold working process, hardness and strength of the metal increases due to increase in dislocation density.

3 COLD WORKING PROCESS  Cold Rolling and wire drawing are the examples of cold working process.

4 % COLD WORK  The % cold work is defined as  And also can be expressed as

5 % COLD WORK (Continue)  Where A 0 is the original area of cross section  A d is the area after deformation   is the strain.

6 EFFECT OF CW ON TENSILE STRENGTH

7 EFFECT OF CW ON YIELD STRENGTH

8 EFFECT OF CW ON DUCTILITY

9 LAB REPORT  Complete the Table provided to you in lab. Use excel for calculation and attach a print out with the lab report.  Draw a graph hardness vs %CW cumulative using excel, hardness on Y- axis and %CW cumulative on X-axis. Named it as Figure 1.

10 LAB REPORT (Continue)  Draw another graph hardness vs %True strain cumulative using excel, hardness on Y-axis and True strain cumulative on X- axis. Named it as Figure 2.  Include the cover page in your lab report.


Download ppt "COLD WORKING EXPERIMENT # 8 Instructor: M.Yaqub. COLD WORKING  Cold working is the plastic or permanent deformation at room temperature. In this process,"

Similar presentations


Ads by Google