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DTIC ADA169443: Embrittlement of a High and a Low Strength Steel in... |
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by Defense Technical Information Center |
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A study has been made of the cyclic fatigue fracture |
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behavior of single-edge notched specimens of 4340 type |
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high strength (yield stress 160 Ksi) and alloy steel of |
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low strength (yield stress 100 Ksi) with and without a |
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fatigue precrack tested in liquid lead and argon at 700 |
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F. The high strength steel specimens were severely |
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embrittled by liquid lead with stress intensity at |
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fracture some two orders of magnitude lower in liquid |
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lead than in the argon environment. The embrittlement |
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susceptibility was the same for both the notched |
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specimens and for the specimens that had a fatigue |
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precrack at the root of the notch. On the other hand, |
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identical as-notched specimens of low strength steel were |
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immune to lead embrittlement. However, when these |
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specimens were fatigue precracked, they were severely |
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embrittled by liquid lead. This variation is |
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susceptibility to embrittlement is discussed in terms of |
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the prevalent reduction in cohesion mechanism of liquid |
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metal embrittlement. The implications of these results in |
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determining the embrittlement susceptibility or |
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elimination are also discussed. |
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Date Published: 2018-02-08 17:08:28 |
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Identifier: DTIC_ADA169443 |
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Item Size: 16504262 |
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Language: english |
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Media Type: texts |
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# Topics |
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DTIC Archive; Kamdar,M H ; ARMY ARMA... |
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