Structure, strength, and fracture of electrodeposited nickel and Ni-Co alloys

Details Structure, strength, and fracture of electrodeposited nickel and Ni-Co alloys Structure, strength, and fracture of electrodeposited nickel and Ni-Co alloys

Jun 1973

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1973slsci...4.1599t&link_type=abstract

Metallurgical Transactions, Volume 4, Issue 6, pp.1599-1605

Computer Science

Scientific paper

Massive electrodeposits of nickel and Ni-Co alloys ranging up to 43 pct Co were examined microstructurally and tested to determine tensile properties and static and dynamic fracture toughness. Specimens were also tested after being annealed at 575 K. Annealing increased grain size, decreased yield, and ultimate strengths, and increased ductility and dynamic toughness. The as-plated Ni-43 Co was the only material to exhibit valid K IC values, averaging about 38 MN/m3/2. In instrumented dynamic tests on precracked Charpy bars, the same material exhibited a K Id of 50 MN/m3/2. The yield strength of the Ni-43 Co alloy was 1154 MN/m2. All the materials tested showed dimpled, ductile rupture fracture surfaces. The Hall-Petch behavior of the nickel indicated that it is much easier to initiate flow in normal grain boundary structures than in structures composed of dislocation cell walls.

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