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- Title
Determination of the zero strength and plasticity of nickel alloys.
- Authors
Yushchenko, K. A.; Savchenko, V. S.; Zvyagintsev, A. V.
- Abstract
The technique for determination of zero-strength temperature, Tz.s, and zeroductility temperature, Tz.d, is developed and tested with the goal of evaluation of processes, which take place in dispersion-strengthened nickel alloys and in the welded joints of these alloys at temperatures close to the melting temperature point TL. Analysis of changes in tensile strength, σB, at temperatures close to TL shows the presence of an inflection on the strength curve for alloys with both monocrystalline and polycrystalline structures. The temperature of this inflection coincides with the temperature of the sharp fali of relative reduction in area, ψ, to almost zero which indicates the start of melting of cast metal. These suppositions are confirmed by fractographic and metallographic investigations of the structure and fracture surface.
- Subjects
NICKEL alloys; DISPERSION strengthening; WELDED joint metallography; MELTING points; FUSION (Phase transformation)
- Publication
Physics of Metals & Advanced Technologies, 2010, Vol 5, Issue 1, p97
- ISSN
1741-9808
- Publication type
Article