Deformation-induced microstructural changes in Fe40Ni40P14B6 metallic glass

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	Deformation-induced microstructural changes in Fe40Ni40P14B6 metallic glass
	G. J. Fan; M. X. Quan; Z. Q. Hu; W. Loser; J. Eckert
	1999
发表期刊	Journal of Materials Research
ISSN	0884-2914
卷号	14 期号:9 页码:3765-3774
摘要	The effect of mechanical deformation via high-energy ball milling an the structure of the Fe40Ni40P14B6 metallic glass was studied by means of x-ray diffactometry, transmission electron microscopy (TEM), and differential scanning calorimetry (DSC). After 5 h of milling, TEM observations indicated that some nanocrystallites with a diameter of about 6 nm precipitated from surface layers of the amorphous ribbons, whereas the bulk remained amorphous. When milling time was increased to 11 h, bulk crystallization occurred. The amorphous Fe40Ni40P14B6 alloy crystallized into a mixture of gamma-(Fe,Ni) and (Fe,Ni)(3)(P,B). To understand the microstructural changes occurring in the amorphous ribbons before the onset of bulk crystallization, the isothermal crystallization behavior of as-deformed amorphous ribbons was studied. Compared with as-quenched amorphous ribbons, the local value of the Avrami exponent, derived from isothermal DSC data, increased from 3.5 to 4.1 for bulk crystallization. The thermal crystallization mechanism of deformed amorphous Fe40Ni40P14B6 ribbons changed from an eutectic-type reaction with simultaneous precipitation of gamma-(Fe,Ni) and (Fe,Ni)(3)(P,B) from the amorphous matrix to a primary-type reaction with precipitation of alpha-Fe(P,B) preceding the formation of gamma-(Fe,Ni) and (Fe,Ni)(3)(P,B). Our results suggest that several hours of mechanical milling cause surface crystallization and some atomic rearrangements in the amorphous alloy. The latter effect may be responsible for the observed primary-type reaction for crystallization of the deformed amorphous alloy.
部门归属	chinese acad sci, inst met res, state key lab rsa, shenyang 110015, peoples r china. ifw dresden, inst met mat, d-01171 dresden, germany.;fan, gj (reprint author), chinese acad sci, inst met res, state key lab rsa, shenyang 110015, peoples r china
关键词	Induced Nanocrystal Formation Amorphous-alloys Fe80b20 Alloy Shear Bands Crystallization Transformation State
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WOS记录号	WOS:000086498900040
引用统计	被引频次：27[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/37352
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	G. J. Fan,M. X. Quan,Z. Q. Hu,et al. Deformation-induced microstructural changes in Fe40Ni40P14B6 metallic glass[J]. Journal of Materials Research,1999,14(9):3765-3774.
APA	G. J. Fan,M. X. Quan,Z. Q. Hu,W. Loser,&J. Eckert.(1999).Deformation-induced microstructural changes in Fe40Ni40P14B6 metallic glass.Journal of Materials Research,14(9),3765-3774.
MLA	G. J. Fan,et al."Deformation-induced microstructural changes in Fe40Ni40P14B6 metallic glass".Journal of Materials Research 14.9(1999):3765-3774.