Texture and microstructure at the surface of an AISI D2 steel treated by high current pulsed electron beam

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	Texture and microstructure at the surface of an AISI D2 steel treated by high current pulsed electron beam
	J. X. Zou; T. Grosdidier; B. Bolle; K. M. Zhang; C. Dong
	2007
发表期刊	Metallurgical and Materials Transactions a-Physical Metallurgy and Materials Science
ISSN	1073-5623
卷号	38A 期号:9 页码:2061-2071
摘要	Surface modifications were investigated for an AISI D2 steel after 25 pulses of high current pulsed electron beam (HCPEB) treatment. In particular, X-ray diffraction (XRD) was used to determine the thickness, nature of phase, and texture in the top surface melted layer. The mechanisms responsible for the structure and texture evolutions were further asserted by scanning electron microscopy (SEM) and electron backscattering diffraction (EBSD) results. Under the action of the beam, the large carbides present in the steel were melted and dissolved so that the top surface rapidly solidified as a 3-mu m-thick layer of ultra-fine-grained metastable austenite without any martensite formation. The growth of the phase led to an unusual < 100 > + < 110 > fiber solidification texture. In addition, Sigma 3-twin boundaries were observed to bridge, most often, near < 110 > domains. These features, observed here in a Fe supersaturated and highly undercooled melt, are discussed in light of recent findings on atypical growth in directionally solidified Al-based alloys. ([40-42]) Comparatively, the a phase present in the heat-affected zone remained randomly oriented.
部门归属	univ paul verlaine metz, cnrs, letam, umr 7078, f-57012 metz, france. dalian univ technol, state key lab mat modificat, dalian 116024, peoples r china. dalian univ technol, sch mat sci & engn, dalian 116024, peoples r china. chinese acad sci, int ctr mat phys, shenyang 110016, peoples r china.;zou, jx (reprint author), univ paul verlaine metz, cnrs, letam, umr 7078, f-57012 metz, france;thierry.grosdidier@univ-metz.fr
关键词	Dendrite Growth Directions Ion-beams Phase Formations Alloys Transformations Temperatures Irradiation Simulation Metals Ti
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WOS记录号	WOS:000249538900023
引用统计	被引频次：51[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/321006/34120
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	J. X. Zou,T. Grosdidier,B. Bolle,et al. Texture and microstructure at the surface of an AISI D2 steel treated by high current pulsed electron beam[J]. Metallurgical and Materials Transactions a-Physical Metallurgy and Materials Science,2007,38A(9):2061-2071.
APA	J. X. Zou,T. Grosdidier,B. Bolle,K. M. Zhang,&C. Dong.(2007).Texture and microstructure at the surface of an AISI D2 steel treated by high current pulsed electron beam.Metallurgical and Materials Transactions a-Physical Metallurgy and Materials Science,38A(9),2061-2071.
MLA	J. X. Zou,et al."Texture and microstructure at the surface of an AISI D2 steel treated by high current pulsed electron beam".Metallurgical and Materials Transactions a-Physical Metallurgy and Materials Science 38A.9(2007):2061-2071.