Details
| Original language | English |
|---|---|
| Pages (from-to) | S393-S398 |
| Journal | Journal of alloys and compounds |
| Volume | 577 |
| Issue number | SUPPL. 1 |
| Publication status | Published - 23 Feb 2012 |
| Externally published | Yes |
Abstract
In the present study the temperature interval of superelasticity in Ti 49.4Ni50.6, Co49Ni21Ga30, Ni54Fe19Ga27 and Fe41Ni 28Co17Al11.5Ta2.5 (at%) single crystals are investigated. It is shown that it is necessary to produce materials with (i) a high yield stress level of the high-temperature phase of |σcrA| ∼ G/300-G/100 (G is shear modulus), and (ii) a low value of α = d|σcrM|/dT (|σcrM| is the critical stress required for stress-induced martensitic transformation) to achieve high-temperature superelasticity at T > 373 K. A high stress level of austenite |σcrA| can be obtained through selection of the crystal axis orientation, the stress state (tension vs. compression), variation of the chemical composition of the intermetallic compounds, and precipitation of dispersed particles. Low values of α are realized for crystal orientations providing maximum values for the transformation strain É0|.
Keywords
- Crystal growth, High-temperature alloys, Phase transitions, Shape memory
ASJC Scopus subject areas
- Engineering(all)
- Mechanics of Materials
- Engineering(all)
- Mechanical Engineering
- Materials Science(all)
- Metals and Alloys
- Materials Science(all)
- Materials Chemistry
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In: Journal of alloys and compounds, Vol. 577, No. SUPPL. 1, 23.02.2012, p. S393-S398.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Shape memory effect and high-temperature superelasticity in high-strength single crystals
AU - Chumlyakov, Yu
AU - Kireeva, I.
AU - Panchenko, E.
AU - Karaman, I.
AU - Maier, H. J.
AU - Timofeeva, E.
N1 - Funding information: This work was supported by the following research grants: RFBR , 09-03-00103-? , 10-03-00154-a , 10-08-92501 IK ; Federal Programs , 16.740.11.0462 , 14.740.11.0258 ; CRDF RUE1 - 2983-TO-10 .
PY - 2012/2/23
Y1 - 2012/2/23
N2 - In the present study the temperature interval of superelasticity in Ti 49.4Ni50.6, Co49Ni21Ga30, Ni54Fe19Ga27 and Fe41Ni 28Co17Al11.5Ta2.5 (at%) single crystals are investigated. It is shown that it is necessary to produce materials with (i) a high yield stress level of the high-temperature phase of |σcrA| ∼ G/300-G/100 (G is shear modulus), and (ii) a low value of α = d|σcrM|/dT (|σcrM| is the critical stress required for stress-induced martensitic transformation) to achieve high-temperature superelasticity at T > 373 K. A high stress level of austenite |σcrA| can be obtained through selection of the crystal axis orientation, the stress state (tension vs. compression), variation of the chemical composition of the intermetallic compounds, and precipitation of dispersed particles. Low values of α are realized for crystal orientations providing maximum values for the transformation strain É0|.
AB - In the present study the temperature interval of superelasticity in Ti 49.4Ni50.6, Co49Ni21Ga30, Ni54Fe19Ga27 and Fe41Ni 28Co17Al11.5Ta2.5 (at%) single crystals are investigated. It is shown that it is necessary to produce materials with (i) a high yield stress level of the high-temperature phase of |σcrA| ∼ G/300-G/100 (G is shear modulus), and (ii) a low value of α = d|σcrM|/dT (|σcrM| is the critical stress required for stress-induced martensitic transformation) to achieve high-temperature superelasticity at T > 373 K. A high stress level of austenite |σcrA| can be obtained through selection of the crystal axis orientation, the stress state (tension vs. compression), variation of the chemical composition of the intermetallic compounds, and precipitation of dispersed particles. Low values of α are realized for crystal orientations providing maximum values for the transformation strain É0|.
KW - Crystal growth
KW - High-temperature alloys
KW - Phase transitions
KW - Shape memory
UR - http://www.scopus.com/inward/record.url?scp=84891623745&partnerID=8YFLogxK
U2 - 10.1016/j.jallcom.2012.02.003
DO - 10.1016/j.jallcom.2012.02.003
M3 - Article
AN - SCOPUS:84891623745
VL - 577
SP - S393-S398
JO - Journal of alloys and compounds
JF - Journal of alloys and compounds
SN - 0925-8388
IS - SUPPL. 1
ER -