Skip to main content
placeholder image

Determination of the parent grain orientation and habit plane normals for �����1 martensite in a Cu-Al-Ni-Mn shape memory alloy

Journal Article


Abstract


  • Martensiteplates in �����1 shape memory alloys commonly form self-accommodating groups of four plate variants with habit plane normals clustered about a {1 1 0} pole of the parent phase. In the present work, the crystallography of martensitic transformation in a Cu-Al-Ni-Mn shape memory alloy has been investigated with particular emphasis on accurate habit plane determination. The characteristically high martensite start (Ms) temperature of �����1 alloys makes it impossible to analyse samples containing isolated plates within a ��1 grain at ambient temperature. However, the parent ��1 grain orientation has been determined in this work by means of a new method of junction plane trace analysis, which is based on the knowledge that the junction planes are precisely {1 1 0}��1 planes. The mutual consistency of the experimental results indicates that this technique of junction plane traces analysis is a viable method for determining the parent ��1 grain orientation. Habit plane normals were determined by two surface trace measurements and referred to the parent crystal basis by using the ��1 grain orientation matrix. The habit plane normal was determined to be close to {1 5 5}��1 with the scatter in a series of mean value determinations being less than �� 1.2��.

UOW Authors


Publication Date


  • 1997

Citation


  • Chen, L., Dunne, D. P., & Kennon, N. F. (1997). Determination of the parent grain orientation and habit plane normals for �����1 martensite in a Cu-Al-Ni-Mn shape memory alloy. Journal of Materials Science, 32(14), 3769-3773. doi:10.1023/A:1018671506278

Scopus Eid


  • 2-s2.0-0031186901

Web Of Science Accession Number


Start Page


  • 3769

End Page


  • 3773

Volume


  • 32

Issue


  • 14

Place Of Publication


Abstract


  • Martensiteplates in �����1 shape memory alloys commonly form self-accommodating groups of four plate variants with habit plane normals clustered about a {1 1 0} pole of the parent phase. In the present work, the crystallography of martensitic transformation in a Cu-Al-Ni-Mn shape memory alloy has been investigated with particular emphasis on accurate habit plane determination. The characteristically high martensite start (Ms) temperature of �����1 alloys makes it impossible to analyse samples containing isolated plates within a ��1 grain at ambient temperature. However, the parent ��1 grain orientation has been determined in this work by means of a new method of junction plane trace analysis, which is based on the knowledge that the junction planes are precisely {1 1 0}��1 planes. The mutual consistency of the experimental results indicates that this technique of junction plane traces analysis is a viable method for determining the parent ��1 grain orientation. Habit plane normals were determined by two surface trace measurements and referred to the parent crystal basis by using the ��1 grain orientation matrix. The habit plane normal was determined to be close to {1 5 5}��1 with the scatter in a series of mean value determinations being less than �� 1.2��.

UOW Authors


Publication Date


  • 1997

Citation


  • Chen, L., Dunne, D. P., & Kennon, N. F. (1997). Determination of the parent grain orientation and habit plane normals for �����1 martensite in a Cu-Al-Ni-Mn shape memory alloy. Journal of Materials Science, 32(14), 3769-3773. doi:10.1023/A:1018671506278

Scopus Eid


  • 2-s2.0-0031186901

Web Of Science Accession Number


Start Page


  • 3769

End Page


  • 3773

Volume


  • 32

Issue


  • 14

Place Of Publication