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Relative Volta Potentials of Intermetallics in AZ91-RE Mg Alloy After Solution and Aging Treatment
Ding, Yanfang; Jia, Ruiling; Zhang, Wei; Zhang, Huixia; Hou, Jian
2019
Source PublicationJOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY
ISSN1533-4880
Volume19Issue:1Pages:188-193
AbstractAZ91 alloy with 1.0 wt.% (La, Ce) mischmetal (MM) addition was solution treated at 593 K for 4 h, 653 K for 2 h and 693 K for 8 h (T4), which was subsequently aged at 493 K for 5 h, 8 h and 11 h, respectively. Solid solution and aging treatment mainly led to the change of number of beta-Mg17Al12 phases and the size of mischmetal (MM) intermetallics. The relative potential difference is an index for local corrosion of alloys because the corrosion is driven by micro-galvanic coupling of the microstructure. In the present work, the relative Volta potential difference between the dominated intermetallic phase and Mg-matrix phase in the AZ91 alloy with (La, Ce) MM addition after heat treatment was measured by scanning Kelvin probe force microscopy (SKPFM). Then correlative changes of relative Volta potentials of intermetallic phases with solid-solution-treatment and subsequently aging treatment (T6) were inferred. The relative Volta potential difference of mischmetal intermetallic phases increased with the solid solution treatment. With the increase of aging time, the relative Volta potential difference of mischmetal intermetallic phases decreased. The relative Volta potential difference of intermetallic phases containing rare earth was ranked as: T6-11 h < T6-8 h < T6-5 h < as-received < T4.
KeywordRelative Volta Potential Difference Scanning Probe Microscopy Nanometer Phase Heat Treatment
Indexed BySCI
Language英语
WOS IDWOS:000447641700025
PublisherAMER SCIENTIFIC PUBLISHERS
Citation statistics
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/81522
Collection中国科学院金属研究所
Recommended Citation
GB/T 7714
Ding, Yanfang,Jia, Ruiling,Zhang, Wei,et al. Relative Volta Potentials of Intermetallics in AZ91-RE Mg Alloy After Solution and Aging Treatment[J]. JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY,2019,19(1):188-193.
APA Ding, Yanfang,Jia, Ruiling,Zhang, Wei,Zhang, Huixia,&Hou, Jian.(2019).Relative Volta Potentials of Intermetallics in AZ91-RE Mg Alloy After Solution and Aging Treatment.JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY,19(1),188-193.
MLA Ding, Yanfang,et al."Relative Volta Potentials of Intermetallics in AZ91-RE Mg Alloy After Solution and Aging Treatment".JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY 19.1(2019):188-193.
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