Locating bulk metallic glasses with high fracture toughness Chemical effects and composition optimization
文献类型：期刊论文
| 作者 | Q. A. He ; Y. Q. Cheng ; E. Ma ; J. A. Xu |
| 刊名 | Acta Materialia
 |
| 出版日期 | 2011 |
| 卷号 | 59期号:1页码:202-215 |
| 关键词 | Metallic glasses Fracture toughness Elastic moduli Nonlinear elastic fracture Zirconium zr-cu-al amorphous-alloys mechanical-properties temperature plasticity ductile |
| ISSN号 | 1359-6454 |
| 中文摘要 | We have developed new bulk metallic glasses (BMGs) with optimized glass-forming ability (GFA), in ternary Zr-Cu-Al and quaternary Zr-Ti-Cu-Al systems The relatively large dimensions of these BMGs permitted fracture toughness tests leading to the discovery of Zr(61)T1(2)Cu(25)Al(12) (ZT1) that has a toughness among the highest for monolithic BMGs (fatigue pre-cracked fracture toughness K(max), in excess of similar to 100 MPa root m, with a nonlinear-elastic fracture behavior as seen in the resistance curve) We have also measured the toughness for Zr-TM-Al (TM = Co, Ni) BMGs, which have previously been optimized for GFA Comparing the BMGs studied, in conjunction with literature data on Zr-based BMGs we have identified trends in chemistry effects on BMG fracture toughness, in particular the role of Al as well as the effects of Cu when substituting Ni (or Co) These trends are explained in terms of not only the internal atomic packing structure, but more importantly the electronic structure and nature of bonding in light of the first-principles calculations A strategy is then outlined to locate BMG compositions with high toughness The correlations of the BMG toughness with the shear banding behavior, the Poisson's ratio (v), the product of shear modulus and molar volume (mu V(m)), and the glass transition temperature (T(g)), are also discussed (C) 2010 Acta Materialia Inc Published by Elsevier Ltd All rights reserved |
| 原文出处 | |
| 公开日期 | 2012-04-13 |
| 源URL | [http://210.72.142.130/handle/321006/30383]  |
| 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. A. He,Y. Q. Cheng,E. Ma,et al. Locating bulk metallic glasses with high fracture toughness Chemical effects and composition optimization[J]. Acta Materialia,2011,59(1):202-215. |
| APA | Q. A. He,Y. Q. Cheng,E. Ma,&J. A. Xu.(2011).Locating bulk metallic glasses with high fracture toughness Chemical effects and composition optimization.Acta Materialia,59(1),202-215. |
| MLA | Q. A. He,et al."Locating bulk metallic glasses with high fracture toughness Chemical effects and composition optimization".Acta Materialia 59.1(2011):202-215. |
入库方式： OAI收割
来源：金属研究所
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