Korean Institute of Surface Engineering

pISSN : 1225-8024 | eISSN : 3399-8403


공학

한국표면공학회지 (17권3호 73-77)

Measurement of Residual Stresses in Nickel Electrodeposits

니켈전착층의 잔류응력 측정

이흥로;서동수;이동녕;
Lee, Hong-Ro;Suhr, Dong-Su;Lee, Dong-Nyung;

충남대학교 공과대학;서울대학교 공과대학;
충남대학교 공과대학;서울대학교 공과대학;

Abstract

The surface residual stresses in 1mm thick nickel electrodeposits obtained from four types of nickel sulphamate baths at 40 to 60$^{circ}C$ and 5 to 25 amps./$dm^2$ were measured by a X-ray method. An increase in nickel chloride concentration in the bath tends to increase tensile residual stresses in the deposits. Addition of no chloride or little chloride in the baths gave rise to little residual stresses or even compressive stresses in the deposits. The residual stresses in most specimens did not exceed 80 MPa and showed minimum in the specimens obtained at 50$^{circ}C$.

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