Anomalies in temperature dependence of mechanical properties and thermal expansion of age hardenable invar alloy Fe-40% Ni-08% Be

Journal Article · Thu Aug 15 00:00:00 EDT 1996 · Scripta Materialia

DOI:https://doi.org/10.1016/1359-6462(96)00140-6· OSTI ID:271630

Gulyaev, A; Svistunova, E L ^[1]

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1. Inst. of Physical Metallurgy, Moscow (Russian Federation)

It is well established that Fe-Ni invar alloys have low strength. As it was shown in the previous paper additions of small amounts (about 1 wt.%) Be lead to age-strengthening of these alloys without a significant increase in their linear thermal expansion coefficient (LTEC). The optimal combination of nickel and beryllium in the ternary Fe-Ni-Be alloys has been determined (40 wt.% Ni and 0.8 wt.%Be) to permit an increase in hardness upon aging (at 550 C) while maintaining LTEC at the low level. The aim of the present work is to study the temperature dependence of the LTEC and mechanical properties of Fe-Ni-Be alloy with the optimal composition.

• OSTI ID: 271630
• Journal Information: Scripta Materialia, Vol. 35, Issue 4; Other Information: PBD: 15 Aug 1996
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
IRON BASE ALLOYS
TENSILE PROPERTIES
THERMAL EXPANSION
NICKEL ALLOYS
BERYLLIUM ADDITIONS
SAMPLE PREPARATION
MELTING
FORGING
ROLLING
QUENCHING
AGING
DILATOMETRY
STRAIN RATE
YOUNG MODULUS
TEMPERATURE DEPENDENCE
MICROSTRUCTURE
ELECTRON MICROSCOPY