Thermoelastic behavior of shape memory alloy MN-15Cu-2Ni-3CR

Journal Article · Thu Jun 01 04:00:00 EDT 1995 · Scripta Metallurgica et Materialia

DOI:https://doi.org/10.1016/0956-716X(95)00012-K· OSTI ID:69681

Jee, K K; Song, S Y; Shin, M C ^[1]; Potapov, P L; Baschenko, G A ^[2]

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1. Korea Inst. of Science and Technology, Seoul (Korea, Republic of). Div. of Metals
2. Martensitic Transformation Lab., Moscow (Russian Federation). Inst. of Physical Metallurgy

The aim of this work is to investigate the anomalous behavior of Mn-Cu alloy in both plastic and elastic regions. Mn-15Cu-2Ni-3Cr alloy, used in the present study, exhibits shape memory effect and good mechanical properties, and has a wide range of transformation points when aged at the temperature range of 573--773 K. Martensitic transformation in Mn-15Cu-2Ni-3Cr alloy is shown to be thermoelastic and second-order. However, the alloy, undergoing the second-order transformation, does not exhibit pseudoelasticity. The alloy is deformed by the movement of twin boundaries as well as the slip of dislocations at the early stage, resulting in the incomplete shape memory effect and the absence of the two-step yield. The maximum elastic softening is observed at the temperature of 20--30 K below {Tc} where the best combination of the mobility and tetragonality is found.

• OSTI ID: 69681
• Journal Information: Scripta Metallurgica et Materialia, Journal Name: Scripta Metallurgica et Materialia Journal Issue: 11 Vol. 32; ISSN SCRMEX; ISSN 0956-716X
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
CHROMIUM ALLOYS
COPPER ALLOYS
CRYSTAL-PHASE TRANSFORMATIONS
DISLOCATIONS
ELASTICITY
EXPERIMENTAL DATA
GRAIN BOUNDARIES
MANGANESE BASE ALLOYS
MECHANICAL PROPERTIES
NICKEL ALLOYS
PLASTICITY
SAMPLE PREPARATION
SLIP
TEMPERATURE DEPENDENCE
TRANSMISSION ELECTRON MICROSCOPY
TWINNING
X-RAY DIFFRACTION
YOUNG MODULUS