Acta Metallurgica Sinica (English Letters) ›› 1991, Vol. 4 ›› Issue (2): 143-146.

• Research paper • Previous Articles     Next Articles

GROWTH OF THERMOELASTIC MARTENSITE

DENG Yongrui University of Science and Technology Beijing,Beijing,ChinaG.S.Ansell Colorado School of Mines,Golden,CO 80401,USA) Associate professor,Department of Materials Science and Engineering,University of Science and Technology Beijing,Beijing 100083,China.   

  • Received:1991-04-25 Revised:1991-04-25 Online:1991-04-25 Published:2009-10-10

Abstract: The growth of thermoelastic martensite in a Cu-29% Zn-3% Al alloy has been investigated experimentally and theoretically.Metallographie observations showed that the growth oc- cured thermoelastically,i.e.reversibly,in the radial direction as well as in the thickening di- rection.This is not consistent with the theories of Conhen and some others.A model has been suggested to explain the thermoelasticity of the growth.The basic idea is:the elastic strain distribution is highly heterogeneous and the growth is controlled by the local elastic strain en- ergy at the growth frontier area.The calculated results from the model based on Eshelby's theory are consistent with the observations.

Key words: thermoelasticity, martensite, Cu-Zn-Al alloy