Alloy design of FeMnSiCrNi shape-memory alloys related to stacking-fault energy

Journal Article · Wed Mar 01 04:00:00 EST 2000 · Metallurgical and Materials Transactions. A, Physical Metallurgy and Materials Science

DOI:https://doi.org/10.1007/s11661-000-0001-x· OSTI ID:20023134

Li, J C; Zhao, M; Jiang, Q

The stacking-fault energy ({gamma}{sub sf}) of iron-based shape-memory alloys was calculated by the extended dislocation-node method. The results show that Ni and Mn increase the {gamma}{sub sf} of the alloys with an austenite structure, while Cr and Si decreases it. An expression relating the alloying elements of Ni, Cr, Mn, and Si to the {gamma}{sub sf} of the alloys is established. Moreover, in terms of the {gamma}{sub sf} values of the alloys and the Schaeffer diagram, the alloy design of iron-based shape-memory alloys is carried out. It is found that the alloy having the lowest {gamma}{sub sf} has the best shape-memory effect (SME), with a martensite transition temperature (M{sub s}) being a little lower than ambient temperature. The corresponding composition of the alloy is located in the {gamma}-phase zone near the phase line between the {gamma} and {gamma} + {epsilon} phase zone and the triple point of {alpha} + {gamma} + {epsilon} in the Schaeffer diagram.

• Research Organization: Jilin Univ. of Technology, Changchun (CN)
• OSTI ID: 20023134
• Journal Information: Metallurgical and Materials Transactions. A, Physical Metallurgy and Materials Science, Journal Name: Metallurgical and Materials Transactions. A, Physical Metallurgy and Materials Science Journal Issue: 3 Vol. 31; ISSN MMTAEB; ISSN 1073-5623
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
CHROMIUM ALLOYS
CONCENTRATION RATIO
DESIGN
DISLOCATIONS
IRON ALLOYS
MANGANESE ALLOYS
NICKEL ALLOYS
SHAPE MEMORY EFFECT
SILICON ALLOYS
STACKING FAULTS