Journal of the Korean institute of surface engineering (한국표면공학회지)
- Volume 34 Issue 4
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- Pages.289-296
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- 2001
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- 1225-8024(pISSN)
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- 2288-8403(eISSN)
Mechanical Properties and Microstructure of Ni-0.9wt%P Electroformed Layer
Ni-0.9wt%P 전주층의 기계적 특성 및 미세조직
Abstract
Ni-P electroformed layers were investigated for developing a steam generator tube repair technology in PWRs. The effects of an additive, RPP (Reagent over Pitting Protection) and agitation on mechanical properties and microstructure of the layer were evaluated. The addition of the RPP showed to inhibit the formation of pores, to refine the grain size, and to increase the residual stress in the layer. However, the agitation of the solution during electroforming was observed to increase pores in local regions of the electroformed layer, resulting in decreasing its mechanical properties. The heat treatment of the layer at
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