Effects of Thermal Exposure and Test Temperature on Structure Evolution and Hardness/Viscosity of an Iron-Based Metallic Glass

被引：27

作者：

Nouri, A. Shamimi ^{[1
]}

Liu, Y. ^{[1
,2
]}

Lewandowski, J. J. ^{[1
]}

机构：

[1] Case Western Reserve Univ, Dept Mat Sci & Engn, Cleveland, OH 44106 USA

[2] Wayne State Univ, Dept Chem, Detroit, MI 48202 USA

来源：

METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE | 2009年 / 40A卷 / 06期

关键词：

MECHANICAL-PROPERTIES; SUPERCOOLED LIQUID; VISCOSITY; FLOW; RELAXATION; PRESSURE;

D O I：

10.1007/s11661-008-9615-1

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

High-temperature microhardness testing on drop-cast ingots of fully amorphous Fe48Mo14Cr15Y2C15B6 was performed in order to determine the behavior and structure evolution of this Fe-bulk metallic glass under a variety of different test conditions. The effects of changes in test temperature on the microhardness/strength were determined over the temperature range from room temperature to 620 A degrees C. Although high (e.g., > 12 GPa) microhardness was exhibited at room temperature, significant hardness reductions were exhibited near T (g) . In addition, the effect of exposure time (up to 300 minutes) at elevated temperature on the evolution of microhardness/strength was also evaluated for selected temperatures between 25 A degrees C and 620 A degrees C. The microhardness results were complemented with X-ray diffraction (XRD), conventional transmission electron microscopy (TEM), and an in-situ heating TEM study in order to evaluate any structural evolution that could explain the large differences in hardness evolution under different test conditions.

引用

页码：1314 / 1323

页数：10

共 27 条

[1]

[Anonymous], 1975, Fracture of brittle solids

[2] PLASTIC-DEFORMATION IN METALLIC GLASSES [J].

ARGON, AS .

ACTA METALLURGICA, 1979, 27 (01) :47-58

[3] Towards the development of a new iron age [J].

Branagan, Daniel J. ;

Sergueeva, Alla V. ;

Mukherjee, Amiya K. .

ADVANCED ENGINEERING MATERIALS, 2006, 8 (10) :940-943

[4] Viscosity of the supercooled liquid and relaxation at the glass transition of the Zr46.75Ti8.25Cu7.5Ni10Be27.5 bulk metallic glass forming alloy [J].

Busch, R ;

Bakke, E ;

Johnson, WL .

ACTA MATERIALIA, 1998, 46 (13) :4725-4732

[5] Quantitative differential interference contrast microscopy based on structured-aperture interference [J].

Cui, Xiquan ;

Lew, Matthew ;

Yang, Changhuei .

APPLIED PHYSICS LETTERS, 2008, 93 (09)

[6] Bulk metallic glasses: At the cutting edge of metals research [J].

Greer, A. L. ;

Ma, E. .

MRS BULLETIN, 2007, 32 (08) :611-615

[7] METALLIC GLASSES [J].

GREER, AL .

SCIENCE, 1995, 267 (5206) :1947-1953

[8] Mechanical properties of iron-based bulk metallic glasses [J].

Gu, X. J. ;

Poon, S. Joseph ;

Shiflet, Gary J. .

JOURNAL OF MATERIALS RESEARCH, 2007, 22 (02) :344-351

[9] Critical cooling rate for Fe48Cr15Mo14Y2C15B6 bulk metallic glass formation [J].

Hildal, K. ;

Sekido, N. ;

Perepezko, J. H. .

INTERMETALLICS, 2006, 14 (8-9) :898-902

[10]

HILDAL K, MAT SCI TECHNOLOGY C, P361

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