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Does strain rate ever decrease yield stress?

  1. Feb 15, 2017 #1
    I've been digging through literature the last few days, and I'm starting to wonder if increasing strain rate EVER decreases yield stress? I found anomalies which increase it with increasing temperature. But I cant' find the reverse, so I was wondering if it was possible?
     
  2. jcsd
  3. Feb 16, 2017 #2

    Mapes

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    Fig. 7c is one example. You'll find many more if you do a search for "yield strength"+"negative strain rate sensitivity".
     
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