The Internal Friction Spectrum of Premartensitic Transformations

Mercier, O.; Tirbonod, B.; Torok, E. J.

doi:10.1051/jphyscol:19815160

Cited by 5 publications

(3 citation statements)

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“…There have been many investigations of the ternary Ti 50 Ni 50−x Cu x alloys, focusing on their shape memory properties [28][29][30][31][32][33], martensitic transformation behaviors [30,[34][35][36][37] and mechanical characteristics [32,[38][39][40]. These investigations have shown that the sensitivity of Ms temperature to composition in Ti 50 Ni 50−x Cu x alloys can be reduced.…”

Section: Introductionmentioning

confidence: 99%

A study of Ti50−x/2Ni40−x/2Cu10Crx (x = 0 ∼ 1at.%) shape memory alloys

Lin

Yang

Lin

et al. 2005

Journal of Alloys and Compounds

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Section: Introductionmentioning

confidence: 99%

A study of Ti50−x/2Ni40−x/2Cu10Crx (x = 0 ∼ 1at.%) shape memory alloys

Lin

Yang

Lin

et al. 2005

Journal of Alloys and Compounds

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“…2a). The former is associated with a prominent decrease in the shear modulus [5]. On heating, a single non-symmetric peak is observed, again with a noticeable decrease in the modulus at the shoulder of the peaks.…”

Section: Internal Frictionmentioning

confidence: 83%

Study of the Phase Transformations in Ni-Ti Based Shape Memory Alloys

Jordan

Chandrasekaran²,

Masse

et al. 1995

J. Phys. IV France

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Structural changes with cooling and heating of Ni-Ti alloys involve three phases : austenite, R-phase and martensite. The corresponding transformation sequences are often studied by techniques such as differential scanning calorimetry and internal friction. Structural transformation between any two phases is identified in these measurements by a peak in the studied property versus temperature plot. On this basis, the evidence of two transformations, austenite -+ R-phase and R-phase -, martensite, have been established in the literature. In spite of exhibiting these two transitions on cooling, the reverse transformation from martensite, on heating, can be associated with one or two peaks. The exact interpretation of this behaviour thus poses an open question. This is attended to in this communication and the possible transformation sequences will be discussed with qualitative model. The data for the present investigation have been obtained on NisoTiso and Ni47Ti5~Co3 alloys.

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“…In the case of thermoelastic martensite alloys like TiNi (14), however, no peaks of thermal activation have been still found in the damping capacity, though they are finely twinned. On the other hand, In-Tl alloys, which transform similarly from the fcc to fct and fco structures corresponding to lattice softening (12) , show thermally activated peaks of damping capacity(15) (16).De Morton (15) proposed as a mechanism for one of the peaks the redistribution of alloying elements associated with migration of twin boundaries.…”

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confidence: 99%

Damping Capacity of (Mn1−XCoX)0.95Cu0.05 Metastable γ-Phase Alloys

Ito

Tsukishima

1985

Trans. JIM

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The free decay of flexural vibration in (Mn,_XCox)Cuo .o5 metalstable alloys was examined with a frefcc alloys, while fct (both with c/a<1 and c/a>1) and fco alloys showed a high (SDC =12%) but broad peak between 250K and 280K as well as a relatively large increase of damping capacity (SDC=2% at 125K) with decreasing temperature below 180K.Young's modulus showed either a broad maximum or a minimum in this temperature range, depending on the alloy concentration. No anomalies were, however, observed in both the damping capacity and Young's modulus at fcc/fct or fct/fco transition temperatures.As compared with results of other y-Mn alloys previously reported, these characteristics have been concluded to be essentially common to the y-Mn alloys. Effects of cold rolling on these properties were further examined. But clarification of the detailed mechanisms of the damping process have not been aimed at.

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The Internal Friction Spectrum of Premartensitic Transformations

Cited by 5 publications

References 0 publications

A study of Ti50−x/2Ni40−x/2Cu10Crx (x = 0 ∼ 1at.%) shape memory alloys

A study of Ti50−x/2Ni40−x/2Cu10Crx (x = 0 ∼ 1at.%) shape memory alloys

Study of the Phase Transformations in Ni-Ti Based Shape Memory Alloys

Damping Capacity of (Mn<SUB>1−<I>X</I></SUB>Co<I><SUB>X</SUB></I>)<SUB>0.95</SUB>Cu<SUB>0.05</SUB> Metastable γ-Phase Alloys

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The Internal Friction Spectrum of Premartensitic Transformations

Cited by 5 publications

References 0 publications

A study of Ti50−x/2Ni40−x/2Cu10Crx (x = 0 ∼ 1at.%) shape memory alloys

A study of Ti50−x/2Ni40−x/2Cu10Crx (x = 0 ∼ 1at.%) shape memory alloys

Study of the Phase Transformations in Ni-Ti Based Shape Memory Alloys

Damping Capacity of (Mn<SUB>1&minus;<I>X</I></SUB>Co<I><SUB>X</SUB></I>)<SUB>0.95</SUB>Cu<SUB>0.05</SUB> Metastable &gamma;-Phase Alloys

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Damping Capacity of (Mn<SUB>1−<I>X</I></SUB>Co<I><SUB>X</SUB></I>)<SUB>0.95</SUB>Cu<SUB>0.05</SUB> Metastable γ-Phase Alloys