In:
Journal of Materials Research, Springer Science and Business Media LLC, Vol. 16, No. 10 ( 2001-10), p. 2836-2844
Abstract:
High-strength Cu-based bulk glassy alloys were formed in the Cu–Hf–Ti system by the copper mold casting and melt clamp forging methods. The maximum diameter is 4 mm for the Cu 60 Hf 25 Ti 15 alloy. The substitution of Hf in the Cu 60 Hf 40 alloy by Ti causes an increase in the glass-forming ability (GFA). As the Ti content increases, the glass transition temperature ( T g ) decreases, while the crystallization temperature ( T x ) shows a maximum at 5% Ti and then decreases, resulting in a maximum supercooled liquid region Δ T x (= T x − T g ) of 78 K at 5% Ti. The liquidus temperature ( T 1 ) has a minimum of 1172 K around 20% Ti, and hence, a maximum T g / /T 1 of 0.62 is obtained at 20% Ti. The high GFA was obtained at the compositions with high T g /T 1 . The bulk glassy alloy exhibits tensile fracture strength of 2130 MPa, compressive fracture strength of 2160 MPa, and compressive plastic elongation of 0.8 to 1.6%. The new Cu-based bulk glassy alloys with high T g /T 1 above 0.60, high fracture strength above 2100 MPa, and distinct plastic elongation are encouraging for future development as a new type of bulk glassy alloy that can be used for structural materials.
Type of Medium:
Online Resource
ISSN:
0884-2914
,
2044-5326
DOI:
10.1557/JMR.2001.0391
Language:
English
Publisher:
Springer Science and Business Media LLC
Publication Date:
2001
detail.hit.zdb_id:
54876-5
detail.hit.zdb_id:
2015297-8
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