Nonmagnetic Elinvar-Type Alloys in the Mn-Cu-Ni System

Masumoto Hakaru, Sawaya Shôhachi, Kikuchi Michio

doi:10.2320/jinstmet1952.35.12_1155

Measurements of Young’s modulus at −150°∼400°C and of the thermal expansion, rigidity modulus and hardness at room temperature have been carried out with Mn-Cu-Ni alloys subjected to a variety of heat treatment and cold working. Mn-Cu-Ni alloys containing 5.06∼55.16%Cu and 4.08∼25.35%Ni slow-cooled after heating for 1 hr at 950°C showed a minimum in Young’s modulus vs.temperature curves and its minimum may be a antiferromagnetic Néel points. The values of Young’s modulus at room temperature in the annealed state were higher than those in the cold-worked or water-quenched states, the difference becoming remarkably large with increasing manganese or nickel content. The temperature coefficient of Young’s modulus showed a wide variation by annealing, water-quenching, cold-working and reheating after water-quenching or cold-working, and also with alloy composition. It is also to be noted that the temperature coefficients of Young’s modulus as a function of composition exhibited a large maximum and minimum in positive or negative signs, thus showing the Elinvar property. The variation in rigidity modulus and its temperature coefficient by heat treatment, cold-working and composition showed a close resemblance to that in Young’s modulus and its temperature coefficient. The hardness in the annealed, cold-worked and water-quenched states were generally lower than that in reheated state after cold-working or water-quenching. Further the oxidation and corrosion resistance properties of Mn-Cu-Ni alloys were superior to those Mn-Cu and Mn-Ni binary alloys.

Nonmagnetic Elinvar-Type Alloys in the Mn-Cu-Ni System

Bibliographic Information

Search this article

Abstract

Journal

Citations (5)*help

Keywords

Details 詳細情報について

Export

Report a problem