A study on martensitic transformation in Ti50-x/2Ni50-x/2Cux alloys with X≤10 at%
Journal
Journal of Materials Science
Journal Volume
30
Journal Issue
6
Pages
1577-1583
Date Issued
1995
Author(s)
Abstract
The effect of Cu additions on the martensitic transformation sequence and temperature in Ti50-x/2Ni50-x/2Cuxalloys with x: 1-10 at% are investigated by ER, DSC, X-ray and IF measurements. Experimental results show that the transformation sequence of Ti50-x/2Ni50-x/2Cux alloys with x: 1-4 at% proceeding as two-stage B2→R→B19′ transformation on cooling and Ti50-x/2Ni50-x/2Cux alloys with x=5, 10 at% have no martensitic transformation. The addition of Cu in Ti50-x/2Ni50-x/2Cux alloys assists the formation of R-phase, a behaviour which is quite different from that in Ti50Ni50-xCux alloys. Both the Ms and TR temperatures decrease rapidly with increasing Cu addition in Ti50-x/2Ni50-x/2Cux alloys with x: 1-4 at%. It is proposed that the Cu+Ni effects on the Ms temperature in Ti50-x/2Ni50-x/2Cux alloys is similar as Cu +Ni effects in Ti50Ni50-xCux alloys and as Ni effects in as-quenched Ni-rich TiNi alloys. © 1995 Chapman & Hall.
Type
journal article