Accession Number : AD0700001

Title :   NICKEL-IRON ALLOYS ELECTRODEPOSITED FROM A SULFATE-CHLORIDE ELECTROLYTE: THE EFFECTS OF MECHANICAL PROPERTIES AND MICROSTRUCTURE OF STRESS-REDUCING AGENT, HEAT TREATMENT, pH, AND CHEMICAL COMPOSITION,

Corporate Author : DEFENCE RESEARCH ESTABLISHMENT ATLANTIC DARTMOUTH (NOVA SCOTIA)

Personal Author(s) : Levy,E. M.

Report Date : 1969

Pagination or Media Count : 6

Abstract : The mechanical properties of nickel-iron alloys electrodeposited at a variety of conditions from a sulfate-chloride electrolyte were determined both before and after the addition of the sodium salt of 1, 3, 6-naphthalenetrisulfonic acid as a stress-reducing agent. Deposits produced in the presence of the stress-reducing agent were both stronger and more ductile than those deposited in its absence. Deposits with strengths over 200,000 psi (140 kg/sq mm) and elongations of 2 to 3 per cent were consistently produced under favorable plating conditions. The highest strength obtained was 257,000 psi (183 kg/sq mm). The ultimate tensile strength and percentage elongation of deposits produced at 10 A/sq dm and 65C in the presence of the stress-reducing agent passed through maxima near a pH of 2.8. The strongest deposits contained 25 to 50 per cent iron. The alloys had laminar microstructures which became granular on annealing and, in general, the more highly developed the laminations, the stronger the deposits. (Author)

Descriptors :   (*NICKEL ALLOYS, *ELECTRODEPOSITION), IRON ALLOYS, MECHANICAL PROPERTIES, MICROSTRUCTURE, ELECTROLYTES, ADDITIVES, HEAT TREATMENT, PH FACTOR, STRESSES, CANADA

Subject Categories : Properties of Metals and Alloys

Distribution Statement : APPROVED FOR PUBLIC RELEASE