Effect of thermal cycling on multistage martensitic transformation in aged ti-50.8 at% ni alloy

Banafsheh Karbakhsh Ravari, Masatoshi Mitsuhara, Sahar Farjami, Minoru Nishida

研究成果: ジャーナルへの寄稿記事

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抄録

The effect of thermal cycling on multistage martensitic transformation (MMT) in aged Ti-50.8 at% Ni alloy was investigated. The specimens were solution-treated at 1273 K for 3.6 ks and then aged at 773 K for 3.6 ks in vacuum without atmosphere regulation. Upon cooling the aged specimens clearly showed quadruple-stage transformation denoted as B2 → R → M1 → M2 → M3. The peak temperatures of exothermic reactions R M1 and M2(corresponding to the R-phase M1 and M2 transformations respectively) in the differential scanning calorimetry (DSC) cooling curve were rather stable up to 100 thermal cycles since there were fine Ti3Ni4 precipitates with high distribution density in the intermediate and grain boundary regions. These precipitates prevented the formation of dislocations during thermal cycling. On the other hand the peak temperature of exothermic reaction M3 (corresponding to the M3 transformation) drastically decreased with increasing the number of thermal cycles since there were large Ti 3Ni4 precipitates with low distribution density. Many dislocations were observed in the central regions of grains after 100 thermal cycles.

元の言語英語
ページ(範囲)2185-2188
ページ数4
ジャーナルMaterials Transactions
54
発行部数12
DOI
出版物ステータス出版済み - 12 30 2013

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Martensitic transformations
martensitic transformation
Thermal cycling
Precipitates
Exothermic reactions
cycles
precipitates
exothermic reactions
Cooling
density distribution
Differential scanning calorimetry
Grain boundaries
cooling
Vacuum
Temperature
heat measurement
grain boundaries
Hot Temperature
atmospheres
vacuum

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

これを引用

Effect of thermal cycling on multistage martensitic transformation in aged ti-50.8 at% ni alloy. / Ravari, Banafsheh Karbakhsh; Mitsuhara, Masatoshi; Farjami, Sahar; Nishida, Minoru.

:: Materials Transactions, 巻 54, 番号 12, 30.12.2013, p. 2185-2188.

研究成果: ジャーナルへの寄稿記事

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abstract = "The effect of thermal cycling on multistage martensitic transformation (MMT) in aged Ti-50.8 at{\%} Ni alloy was investigated. The specimens were solution-treated at 1273 K for 3.6 ks and then aged at 773 K for 3.6 ks in vacuum without atmosphere regulation. Upon cooling the aged specimens clearly showed quadruple-stage transformation denoted as B2 → R → M1 → M2 → M3. The peak temperatures of exothermic reactions R M1 and M2(corresponding to the R-phase M1 and M2 transformations respectively) in the differential scanning calorimetry (DSC) cooling curve were rather stable up to 100 thermal cycles since there were fine Ti3Ni4 precipitates with high distribution density in the intermediate and grain boundary regions. These precipitates prevented the formation of dislocations during thermal cycling. On the other hand the peak temperature of exothermic reaction M3 (corresponding to the M3 transformation) drastically decreased with increasing the number of thermal cycles since there were large Ti 3Ni4 precipitates with low distribution density. Many dislocations were observed in the central regions of grains after 100 thermal cycles.",
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AU - Ravari, Banafsheh Karbakhsh

AU - Mitsuhara, Masatoshi

AU - Farjami, Sahar

AU - Nishida, Minoru

PY - 2013/12/30

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N2 - The effect of thermal cycling on multistage martensitic transformation (MMT) in aged Ti-50.8 at% Ni alloy was investigated. The specimens were solution-treated at 1273 K for 3.6 ks and then aged at 773 K for 3.6 ks in vacuum without atmosphere regulation. Upon cooling the aged specimens clearly showed quadruple-stage transformation denoted as B2 → R → M1 → M2 → M3. The peak temperatures of exothermic reactions R M1 and M2(corresponding to the R-phase M1 and M2 transformations respectively) in the differential scanning calorimetry (DSC) cooling curve were rather stable up to 100 thermal cycles since there were fine Ti3Ni4 precipitates with high distribution density in the intermediate and grain boundary regions. These precipitates prevented the formation of dislocations during thermal cycling. On the other hand the peak temperature of exothermic reaction M3 (corresponding to the M3 transformation) drastically decreased with increasing the number of thermal cycles since there were large Ti 3Ni4 precipitates with low distribution density. Many dislocations were observed in the central regions of grains after 100 thermal cycles.

AB - The effect of thermal cycling on multistage martensitic transformation (MMT) in aged Ti-50.8 at% Ni alloy was investigated. The specimens were solution-treated at 1273 K for 3.6 ks and then aged at 773 K for 3.6 ks in vacuum without atmosphere regulation. Upon cooling the aged specimens clearly showed quadruple-stage transformation denoted as B2 → R → M1 → M2 → M3. The peak temperatures of exothermic reactions R M1 and M2(corresponding to the R-phase M1 and M2 transformations respectively) in the differential scanning calorimetry (DSC) cooling curve were rather stable up to 100 thermal cycles since there were fine Ti3Ni4 precipitates with high distribution density in the intermediate and grain boundary regions. These precipitates prevented the formation of dislocations during thermal cycling. On the other hand the peak temperature of exothermic reaction M3 (corresponding to the M3 transformation) drastically decreased with increasing the number of thermal cycles since there were large Ti 3Ni4 precipitates with low distribution density. Many dislocations were observed in the central regions of grains after 100 thermal cycles.

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