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

Journal Article · Sat May 01 04:00:00 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), Journal Name: Metallurgical Transactions, A (Physical Metallurgy and Materials Science); (United States) Vol. 24:5; ISSN 0360-2133; ISSN MTTABN
• Country of Publication: United States
• Language: English

Related Subjects

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