Mechanical Properties Of The As--Cast Ti--Zr--Ni Bulk Quasicrystalline Alloys

Acta Metall Sin

2004, Vol. 40

Issue (1): 62-66 DOI:

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Mechanical Properties Of The As--Cast Ti--Zr--Ni Bulk Quasicrystalline Alloys

QIANG Jianbing; WANG Yingmin; YUAN Lijiang

Department of Materials Engineering; Dalian University of Technology

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QIANG Jianbing; WANG Yingmin; YUAN Lijiang. Mechanical Properties Of The As--Cast Ti--Zr--Ni Bulk Quasicrystalline Alloys. Acta Metall Sin, 2004, 40(1): 62-66 .

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Abstract Bulk Ti--Zr--Ni quasicrystals (QCs) were prepared by using conventional suction casting method. The characterization on their mechanical properties has been carried out by means of indentation and compression tests at room temperature. The strength indices of the icosahedral phase (I--phase)—based duplex phase alloy (α--Ti(Zr)+I phase) are 5.5 GPa in hardness and 1000 MPa in fracture strength, respectively. The Young's modulus is in the range of 23---36 GPa. The as--castTi60Zr25Ni15 QC--based composite alloy exhibits an elastic deformation capability of 4.2 % under a monaxial compression, which is about 4 times as large as that of Al—based QCs. The quasi--cleavage fracture morphologies indicate the bulk QC--based composite alloys to be brittle fracture.

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Received: 20 January 2003

ZTFLH:	TG136
	TG113.25

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