On Unusually Low Thermal Expansion Found in the Irreversible Iron-Nickel Alloys

スポンサーリンク

概要

• 論文の詳細を見る

• Unusually low thermal expansion was found out from some of the irreversible iron-nickel alloys, and its origin was investigated as a link of the Invar-problem. As the internal stresses were accumulated in these alloys by cold-work or, especially, by repeated thermal cycles between the martensitic transformations α⇆γ, the quantity of transformation from the γ phase to the α phase decreased till the alloys could not transform to the α phase but wholly retained the distorted γ' state. And it was noticeable that this distorted state exhibited the Invar-like almost zero thermal expansion at a wide temperature range. For looking into this phenomenon further, the X-ray investigation as well as the thermal dilatation measurements were carried out. Therefrom it was concluded that the distorted γ' state, which is composed of various intermediate structures such as produced on the way to the martensitic transformation γ&roar;α, gives rise to various regions with different Curie points, especially, more regions with lower Curie points; it is such an inhomogeneous state of magnetization to cause the anomalous properties in the Invar alloys.

• 社団法人日本物理学会の論文
• 1970-06-05

著者

• Tino Yosiaki

  Department Of Physics Faculty Of Science Science University Of Tokyo

• KAGAWA Hozumi

  Department of Physics, Faculty of Science, Science University of Tokyo

• Kagawa Hozumi

  Department Of Physics Faculty Of Science Science University Of Tokyo

• Kagawa Hozumi

  Department of Mechanical Engineering,Faculty of Science and Technology,Science University of Tokyo

関連論文

• The Mossbauer Effect and the Anomalous Properties of the Invar Alloys
• Change of Magnetization in the Para-Process with Tension in One Direction for the Fe-Ni Invar Alloys
• Mossbauer Spectra of the Fe-Ni Invar Alloys under the Influence of Non-Hydrostatic Stress
• Anomalous Volume Magnetostriction of Invar Alloys
• Behaviors of Eutectic Crystals below Their Eutectic Points
• On the Anomalous Thermoplastic Variation In the Invar-Type Iron-Nickel Alloys
• On Zero or Negative Thermal Dilatation and Phase Transformations in Cold-Worked Fe-Ni Inver Alloys
• On the Phase Mixtures Produced by Annealing of Long Duration in the γ-Phase Fe-Ni Inver Alloys
• On the Phase Mixtures Produced by Long Annealing in the γ-Phase Fe-Ni Invar Alloys.II.
• Behaviors of Eutectic Crystals below Their Eutectic Points (II)
• On Unusually Low Thermal Expansion Found in the Irreversible Iron-Nickel Alloys
• On Zero or Negative Thermal Dilatation of the Quenched Irreversible Fe-Ni Invar Alloys
• Effects of Hydrostatic Pressure on the Magnetic Anisotropy Energy Constants in Fe-Ni Invar Alloys

もっと見る 閉じる

スポンサーリンク