TEM observation of structure in superplastically forged CuZnSn new alloys.

• Autorzy: Dutkiewicz J. , Ono N. , Miura S.
• Konferencja: 5th Polish-Japanese Symposium on Advanced Methods of Materials Characterization, Niedzica, 28.08-2.09.2004
• Języki publikacji: EN

Abstrakty

EN

TEM observation was performed to clarify the mechanisms of high speed suerplastic deformation of new commercial alloys base on Cu-40Zn, developed by contolling the microstructure and adding Sn. The new alloys have excellent hot workability, corrosion resistance and also shape memory ability when subjected to heat treatment. As one can conclude from the transmission electron microscopy studies of the initial as quenched structure, the alloys contain alpha, beta and gamma phases. The gamma phase is characterized by a low stacking fault energy and shows many twins, while beta phase transforms after quenching into 9R martensite. The structure of hot deformed samples suggests that grain boundary sliding is an important process in the areas of grain mixture of alpha, beta and gamma phases, however crystallographic slid performed due to dislocations and deformation by twinning may also play an important role in the superplastic forging of these alloys. The gamma phase as a hard phase accumulates plied-up dislocations. The accumulated dislocations will move along the interphase boundary as an avalanche, which is considered to be an important process of superplastic forging. The wavy character of twin interfaces after forging may point to their movement during high temperature deformation.

Słowa kluczowe

EN

TEM; structure; forging; alloy

PL

TEM; struktura; kucie; stop

• Wydawca: Komitet Nauki o Materiałach PAN
• Czasopismo: Archives of Materials Science
• Rocznik: 2005
• Tom: Vol. 26, nr 1-2
• Strony: 127--135
• Opis fizyczny: Bibliogr. 10 poz., rys.

Twórcy

autor

Dutkiewicz J.

• Institute of Metallurgy and Materials Science, Polish Academy of Sciences, 30-059 Kraków, ul. Reymonta 25, Poland

autor

Ono N.

• Dept. of Mechanical Eng., Faculty of Eng., Sojo Univ., 4-22 Ikeda, Kumamoto, 860-0082, Japan

autor

Miura S.

• Dept. of Mechanical Eng., Faculty of Eng., Sojo Univ., 4-22 Ikeda, Kumamoto, 860-0082, Japan

Bibliografia

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