Effect of Phosphorus on the Embrittlement of Copper-Nickel Alloys by Mercury

Costas, L.P.

doi:10.5006/0010-9312-31.3.91

Cited by 14 publications

(3 citation statements)

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“…Funkenbusch, Heldt and Stein 1161 have summarised the models for embrittlement of Monel by hydrogen and by mercury, concluding that the adsorption of atoms at the crack tip reduced the energy needed to create new surfaces by bond rupture without influencing bulk material flow. They found that the addition of phosphorous to Monel decreased the grain boundary embrittlement, in agreement with Costas [17], and suggested that this would hold for any atom that improved the gra'in boundary atomic packing, so hindering the adsorption of foreign atoms, such as hydrogen and mercury. In the present study, any moisture present in the laboratory air may possibly have been sufficient to influence the behavior.…”

Section: Sehf Ohsercationssupporting

confidence: 52%

The Progression of Bending Fatigue in Monel K500

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Henderson

1988

Fatigue Fract Eng Mat Struct

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A comparison was made at room temperature of the fatigue sequence in Monel KS00 (NOSSOO), both between the different states of solution heat treated, aged, and overaged, and with nickel that had been studied previously. The test mode was reversed bending and monitoring was by Nomarski interferencecontrast microscopy, in conjunction with sequential microhardness measurements. I t was found that variations in Monel between the heat treated states were minor in comparison to differences with nickel. In Monel, the fatigue resistance was relatively poor because of ready intergranular. as well as transgranular. cracking. To achieve a significant life, the stress level had to be kept well below the yield strength. low enough to delay the onset of visible slip, for cracking would follow promptly. This meant that, in contrast to nickel, stress levels high enough to invoke strain hardening and obvious secondary slip led to exceedingly short lives. Also. inclusions mattered, slip occurring preferentially in their vicinity.

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Section: Sehf Ohsercationssupporting

confidence: 52%

The Progression of Bending Fatigue in Monel K500

Price

Henderson

1988

Fatigue Fract Eng Mat Struct

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“…Reports for improvements through addi- tions of phosphorous to Cu-alloys are however more variable, as pointed out in Section 1. Earlier work in the literature has reported improved properties with segregated P at grain boundaries when testing the susceptibility to LME by mercury in Ni-Cu and in Nialloys [37,38]. Results in Ref.…”

Section: Discussionmentioning

confidence: 84%

“…Results in Ref. [37] indicate that the positive effect of P strongly depends on the Ni-content of the Cu-alloy. Also, the enhancement due to additions of P must go beyond impeding deleterious segregation of S to grain boundaries.…”

Section: Discussionmentioning

confidence: 95%