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Shaft defect, crack or weld
Hi All, Thank you for your input and you suggestions. We sent the shaft off site for more testing, mag particle and die pen as previously done. These reviled no cracks or identified areas of concern. The TOF (time of flight) UT, which did not pick up anything outside the bounds of the...- thiso
- Post #17
- Forum: Mechanical engineering general discussion
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Shaft defect, crack or weld
From my understanding the material is 4340 forged and turned. Some info extracted from material cert; *Tensile* HBW - 269 0.2% Proof Stress - 720MPa UTS - 890MPa Gauge Length - 50mm Elongation - 20% Reduction Area - 50% I am unsure as to why it would require welding as it is a new shaft and...- thiso
- Post #6
- Forum: Mechanical engineering general discussion
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Shaft defect, crack or weld
The shaft has been locally cleaned with emery tape. NDT has been conducted shortly after to determine the defect. Mag part showed no cracks, nor did die penetration testing. This is strange due to the shaft having defect having a lip which you can feel when you run your finger nail over the...- thiso
- Post #4
- Forum: Mechanical engineering general discussion
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Shaft defect, crack or weld
Hi All, This is my first post so thought i would say hi and fun this past some people that may have seen something similar in the past. Situation is that we had some blokes cleaning a shaft (300mm dia x 2100mm) getting ready to assemble and they came across a defect which has raised some...- thiso
- Thread
- Replies: 17
- Forum: Mechanical engineering general discussion
