Tailoring modulus and hardness of in-situ formed beta-Ti in bulk metallic glass composites by precipitation of isothermal omega-Ti

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	Tailoring modulus and hardness of in-situ formed beta-Ti in bulk metallic glass composites by precipitation of isothermal omega-Ti
	Zhang, L.; Chen, S.; Fu, H. M.; Li, H.; Zhu, Z. W.; Zhang, H. W.; Li, Z. K.; Wang, A. M.; Zhang, H. F.; Zhang, HF (reprint author), Chinese Acad Sci, Shenyang Natl Lab Mat Sci, Inst Met Res, 72 Wenhua Rd, Shenyang 110016, Liaoning, Peoples R China.
刊名	ELSEVIER SCI LTD
	2017-11-05
卷号	133 页码:82-90
关键词	Bulk Metallic Glass Composite Plasticity Omega-ti Modulus Hardness
ISSN号	0264-1275
英文摘要	It is challenging to tailor the mechanical properties of in-situ formed beta phases in Ti/Zr-based bulk metallic glass composites (beta-type BMGCs) without changing the morphologies of the beta phases. Recently, BMGCs containing metastable beta-Ti/Zr phases (metastable beta-type BMGCs) exhibit an exothermic reaction below the glass transition temperature (sub-T-g) of the glassy matrices during heating, however, the corresponding structural origin remains unclear. In this work, the precipitation of. phase inside beta phase was revealed to account for the sub-T-g exothermic event of the metastable Ti45.7Zr33Cu5.8Co3Be12.5 BMGC. The sub-T-g annealing of metastable beta-type BMGCs causes the precipitation of nanometer-sized isothermal. phase, which leads to a large increase in the modulus and hardness of the crystalline phase. This finding provides a novel route to tailor the modulus and hardness of the crystalline phases in BMGCs without changing their morphologies, including volume fractions, sizes, and distributions. On this basis, the influence of the modulus and hardness of the crystalline phase on mechanical properties of BMGCs was exclusively investigated. Our experimental results together with finite-element simulations proved that lower modulus and hardness of the crystalline phase benefit a larger plasticity of BMGCs. (C) 2017 Elsevier Ltd. All rights reserved.; It is challenging to tailor the mechanical properties of in-situ formed beta phases in Ti/Zr-based bulk metallic glass composites (beta-type BMGCs) without changing the morphologies of the beta phases. Recently, BMGCs containing metastable beta-Ti/Zr phases (metastable beta-type BMGCs) exhibit an exothermic reaction below the glass transition temperature (sub-T-g) of the glassy matrices during heating, however, the corresponding structural origin remains unclear. In this work, the precipitation of. phase inside beta phase was revealed to account for the sub-T-g exothermic event of the metastable Ti45.7Zr33Cu5.8Co3Be12.5 BMGC. The sub-T-g annealing of metastable beta-type BMGCs causes the precipitation of nanometer-sized isothermal. phase, which leads to a large increase in the modulus and hardness of the crystalline phase. This finding provides a novel route to tailor the modulus and hardness of the crystalline phases in BMGCs without changing their morphologies, including volume fractions, sizes, and distributions. On this basis, the influence of the modulus and hardness of the crystalline phase on mechanical properties of BMGCs was exclusively investigated. Our experimental results together with finite-element simulations proved that lower modulus and hardness of the crystalline phase benefit a larger plasticity of BMGCs. (C) 2017 Elsevier Ltd. All rights reserved.
学科主题	Materials Science, Multidisciplinary
语种	英语
资助机构	National Natural Science Foundation of China [51434008 (U1435204), 51531005]; China's Manned Space Station Project [TGJZ800-2-RW024]; Science and Technology Planning Project of Guangdong Province, China [2015B090926001]; DongGuan Innovative Research Team Program [2014607134]
公开日期	2018-01-10
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/78988]
专题	金属研究所_中国科学院金属研究所
通讯作者	Zhang, HF (reprint author), Chinese Acad Sci, Shenyang Natl Lab Mat Sci, Inst Met Res, 72 Wenhua Rd, Shenyang 110016, Liaoning, Peoples R China.
推荐引用方式 GB/T 7714	Zhang, L.,Chen, S.,Fu, H. M.,et al. Tailoring modulus and hardness of in-situ formed beta-Ti in bulk metallic glass composites by precipitation of isothermal omega-Ti[J]. ELSEVIER SCI LTD,2017,133:82-90.
APA	Zhang, L..,Chen, S..,Fu, H. M..,Li, H..,Zhu, Z. W..,...&Zhang, HF .(2017).Tailoring modulus and hardness of in-situ formed beta-Ti in bulk metallic glass composites by precipitation of isothermal omega-Ti.ELSEVIER SCI LTD,133,82-90.
MLA	Zhang, L.,et al."Tailoring modulus and hardness of in-situ formed beta-Ti in bulk metallic glass composites by precipitation of isothermal omega-Ti".ELSEVIER SCI LTD 133(2017):82-90.