Brittle fracture of metal stamped part
Brittle fracture of metal stamped part
(OP)
I have a metal stamped part with two 90° bends. Material thickness is 0.070”, material type is S55C, heat treated (Austempered) to HRC 45. The part is then deburred and plated – Yellow Zinc per ASTM B633 Type 2, FeZn5. The part is experiencing brittle fracture through one of the 90° bends at 75% to 90% of its required load and 45% to 60% of its historic max load performance during testing. Should this part be baked for hydrogen embrittlement (375° F for 4 hours) or is that not necessary.
What steps would you take to root cause the problem.
I am doing this:
Analyzing material for carbon content
Researching heat treat process
Analysis for hydrogen embrittlement
Any and all help is appreciated.
RNel
What steps would you take to root cause the problem.
I am doing this:
Analyzing material for carbon content
Researching heat treat process
Analysis for hydrogen embrittlement
Any and all help is appreciated.
RNel





RE: Brittle fracture of metal stamped part
It's usually a good idea to always bake out any H with steels this hard. Use 24 hr. at 375 deg F, not 4.
RE: Brittle fracture of metal stamped part
Regards,
Cory
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