Martensitic-transformation sequence in a Ti[sub 50]Ni[sub 47]Pd[sub 3] alloy

Journal Article · Sat May 01 00:00:00 EDT 1993 · Metallurgical Transactions, A (Physical Metallurgy and Materials Science); (United States)

DOI:https://doi.org/10.1007/BF02657252· OSTI ID:6209227

Lo, Y C; Wu, S K ^[1]

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1. National Taiwan University, Taipei (Taiwan, Province of China)

It is well known that the TiNi shape-memory alloys exhibit B2[leftrightarrow]B19[prime] martensitic-transformation sequence. However, the B2[yields]R[yields]B19[prime] sequence in the forward (cooling) transformation can take place in the TiNi alloys under certain conditions. There are many investigations of B2[yields]R[yields]B19[prime] transformation by electrical resistivity, X-ray diffraction, transmission electron microscopy, tensile tests, and neutron diffraction. Previous measurements have usually been carried out on the forward martensitic transformation. Measurements on the reverse (heating) transformation are seldom used to characterize transformation behavior. The authors have extensively studied the martensitic transformation sequences of TiNi binary alloys and Ti[sub 50]Ni[sub 40]Cu[sub 10] as well as Ti[sub 50]Ni[sub 50[minus]x]Pd[sub x] ternary alloys by internal friction (IF) measurement, and have reported that the IF measurement is a sensitive experimental technique that can reveal two IF peaks during the reverse transformation. In the current article, measurements of IF were conducted over a wide temperature range for the ternary alloy Ti[sub 50]Ni[sub 47]Pd[sub 3]. Emphasis is given to the highlighting properties shown by IF measurement during heating, as well as to clarifying the transformation of Ti[sub 50]Ni[sub 47]Pd[sub 3] alloy.

• OSTI ID: 6209227
• Journal Information: Metallurgical Transactions, A (Physical Metallurgy and Materials Science); (United States), Vol. 24:5; ISSN 0360-2133
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
NICKEL ALLOYS
CRYSTAL-PHASE TRANSFORMATIONS
INTERNAL FRICTION
PALLADIUM ALLOYS
TITANIUM ALLOYS
EXPERIMENTAL DATA
MARTENSITE
TERNARY ALLOY SYSTEMS
X-RAY DIFFRACTION
ALLOY SYSTEMS
ALLOYS
CARBON ADDITIONS
COHERENT SCATTERING
DATA
DIFFRACTION
FRICTION
INFORMATION
IRON ALLOYS
NUMERICAL DATA
PHASE TRANSFORMATIONS
PLATINUM METAL ALLOYS
SCATTERING
360102* - Metals & Alloys- Structure & Phase Studies
360104 - Metals & Alloys- Physical Properties