| Crack-resistance curve of a Zr-Ti-Cu-Al bulk metallic glass with extraordinary fracture toughness |
| Q. He; J. K. Shang; E. Ma; J. Xu
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| 2012
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| 发表期刊 | Acta Materialia
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| ISSN | 1359-6454
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| 卷号 | 60期号:12页码:4940-4949 |
| 摘要 | For the emerging bulk metallic glasses (BMGs), damage tolerance is a key mechanical property needed for their practical applications. To reach a fracture toughness on a par with, or even better than, conventional engineering alloys, the only route reported so far is to compositionally base the BMG on high-cost palladium (Pd), which has a very high Poisson's ratio (similar to 0.42). Here we report the discovery of a Zr61Ti2Cu25Al12 (ZT1) BMG that has a toughness as high as the Pd-based BMG, but at the same time consists of common engineering metals and has robust glass-forming ability. The new BMG, while having an unimpressive Poisson's ratio of 0.367, derives its high toughness from its high propensity for crack deflection and local loading-mode change at the crack tip due to extensive shear band interactions. The crack-resistance curve (R-curve) of this BMG has been obtained from fatigue pre-crack samples, employing standard "single-specimen" and "multiple-specimen" techniques. (C) 2012 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved. |
| 部门归属 | [he, qiang; shang, jian ku; xu, jian] chinese acad sci, shenyang natl lab mat sci, inst met res, shenyang 110016, peoples r china. [shang, jian ku] univ illinois, dept mat sci & engn, urbana, il 61801 usa. [ma, evan] johns hopkins univ, dept mat sci & engn, baltimore, md 21218 usa.;xu, j (reprint author), chinese acad sci, shenyang natl lab mat sci, inst met res, 72 wenhua rd, shenyang 110016, peoples r china.;jianxu@imr.ac.cn
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| 关键词 | Metallic Glasses
Fracture Toughness
R-curve
Crack Growth
Zirconium
Alloys
Amorphous Alloy
Behavior
Morphology
Strength
Fatigue
Zones
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| URL | 查看原文
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| 文献类型 | 期刊论文
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| 条目标识符 | http://ir.imr.ac.cn/handle/321006/59998
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| 专题 | 中国科学院金属研究所
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推荐引用方式
GB/T 7714 |
Q. He,J. K. Shang,E. Ma,et al. Crack-resistance curve of a Zr-Ti-Cu-Al bulk metallic glass with extraordinary fracture toughness[J]. Acta Materialia,2012,60(12):4940-4949.
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| APA |
Q. He,J. K. Shang,E. Ma,&J. Xu.(2012).Crack-resistance curve of a Zr-Ti-Cu-Al bulk metallic glass with extraordinary fracture toughness.Acta Materialia,60(12),4940-4949.
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| MLA |
Q. He,et al."Crack-resistance curve of a Zr-Ti-Cu-Al bulk metallic glass with extraordinary fracture toughness".Acta Materialia 60.12(2012):4940-4949.
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