Effects of boron on the mechanical behavior of a Ni-rich NiAl alloy

Journal Article · Sat May 01 04:00:00 EDT 1993 · Scripta Metallurgica et Materialia; (United States)

DOI:https://doi.org/10.1016/0956-716X(93)90017-M· OSTI ID:6788141

Xie, C Y; Jiang, B H; Hu, G X ^[1]

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1. Shanghai Jiaotong Univ. (China)

The NiAl based intermetallic alloys are currently of considerable interest as new structural materials because of their relatively low density, comparatively high melting temperature and excellent high temperature oxidation resistance. It has also been found that the Ni-rich (62-65 at % Ni) NiAl alloys with the [beta] (B2) structure undergo a thermoelastic martensitic transformation and exhibit the shape memory effect (SME). Unfortunately, the binary NiAl alloys are extremely brittle at ambient temperature and, therefore, are restricted in practical application. The micro-alloying and macro-alloying methods are commonly used to overcome the brittleness of the alloys. It is reported that boron is the most effective microalloying element in improving the ductility and suppressing the intergranular fracture of the Ni[sub 3]Al intermetallic compound containing aluminium less than 25 at %. However, whether boron has a beneficial effect on the binary NiAl alloy with the B2 structure is not clear. The present paper reports the effect of boron on the mechanical 1 and martensitic transformation in a NiAl alloy containing 37.5 at % Al with the B2 structure.

• OSTI ID: 6788141
• Journal Information: Scripta Metallurgica et Materialia; (United States), Journal Name: Scripta Metallurgica et Materialia; (United States) Vol. 28:9; ISSN SCRMEX; ISSN 0956-716X
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360102 -- Metals & Alloys-- Structure & Phase Studies
360103* -- Metals & Alloys-- Mechanical Properties
ALLOYS
ALUMINIUM ALLOYS
BORON
BORON ADDITIONS
BORON ALLOYS
CRYSTAL STRUCTURE
CRYSTAL-PHASE TRANSFORMATIONS
DATA
DUCTILITY
ELEMENTS
EXPERIMENTAL DATA
FRACTURE PROPERTIES
GRAIN SIZE
INFORMATION
INTERMETALLIC COMPOUNDS
MECHANICAL PROPERTIES
METALLURGICAL EFFECTS
MICROSTRUCTURE
NICKEL ALLOYS
NICKEL BASE ALLOYS
NUMERICAL DATA
PHASE TRANSFORMATIONS
SEMIMETALS
SIZE
TENSILE PROPERTIES