Crack-resistance curve of a Zr-Ti-Cu-Al bulk metallic glass with extraordinary fracture toughness
文献类型：期刊论文
| 作者 | Q. He ; J. K. Shang ; E. Ma ; J. Xu |
| 刊名 | Acta Materialia
 |
| 出版日期 | 2012 |
| 卷号 | 60期号:12页码:4940-4949 |
| 关键词 | Metallic glasses Fracture toughness R-curve Crack growth Zirconium alloys amorphous alloy behavior morphology strength fatigue zones |
| ISSN号 | 1359-6454 |
| 中文摘要 | 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. |
| 原文出处 | |
| 公开日期 | 2013-02-05 |
| 源URL | [http://ir.imr.ac.cn/handle/321006/59998]  |
| 专题 | 金属研究所_中国科学院金属研究所 |
| 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. |
| 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. |
| 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. |
入库方式： OAI收割
来源：金属研究所
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