1045 stress corrosion cracking
1045 stress corrosion cracking
(OP)
No mention of 1045 being susceptible to SCC in MIL HDBK 5.
A lab has proclaimed a Normalized 1045 shaft failure as SCC.
Are we justified in going farther?
thanks
Dan T
A lab has proclaimed a Normalized 1045 shaft failure as SCC.
Are we justified in going farther?
thanks
Dan T





RE: 1045 stress corrosion cracking
RE: 1045 stress corrosion cracking
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1045 may or may not be susceptible - it depends on the material and environment details.
RE: 1045 stress corrosion cracking
Based on the similar chemistry I would definitely expect 1045 to respond the same way.
RE: 1045 stress corrosion cracking
The shaft was a bit rusty, which was surprising. No available eye witnesses for the condition of the bearing.
Strong solutions or atmospheres of caustic etc very unlikely. It >should< be a pretty nice place for a shaft to be.
thanks
Dan T
RE: 1045 stress corrosion cracking
RE: 1045 stress corrosion cracking
RE: 1045 stress corrosion cracking
No varying forces, no fatigue.
Too make this tougher, two different metal labs have looked at the fracture surfaces. One says a brittle fracture with no signs of fatigue. One said stress corrosion ( some texts describe the fracture surface from SCC as the same as a brittle fracture). I would not have come to that conclusion, but I'm no metallurgist. A third lab will be checking it out next week with an SEM. I have asked that one of the principal analysts do the peeking.
RE: 1045 stress corrosion cracking
RE: 1045 stress corrosion cracking
RE: 1045 stress corrosion cracking
RE: 1045 stress corrosion cracking
RE: 1045 stress corrosion cracking
RE: 1045 stress corrosion cracking
A CV joint does apply a bending load to the shaft(s). It might be a little difficult to visualize but the torsional load is transmitted thru an angle which of course is the whole purpose of the joint.