Microstructure modification and corrosion resistance enhancement of die-cast Mg-Al-Re alloy by Sr alloying

被引：44
作者：
Dargusch, Matthew S. [1 ]
Shi, Zhiming [1 ,3 ]
Zhu, Hanliang [2 ]
Atrens, Andrej [3 ]
Song, Guang-Ling [3 ,4 ]
机构：
[1] Univ Queensland, Ctr Adv Mat Proc & Mfg AMPAM, Sch Mech & Min Engn, Brisbane, Qld 4072, Australia
[2] Australian Nucl Sci & Technol Org, Locked Bag 2001, Sydney, NSW 2232, Australia
[3] Univ Queensland, Sch Mech & Min Engn, Mat Engn, Brisbane, Qld 4072, Australia
[4] Xiamen Univ, Coll Mat, Ctr Marine Mat Corms & Protect, State Key Lab Phys Chem Solid State Surfaces, Xiamen 361005, Fujian, Peoples R China
来源：
JOURNAL OF MAGNESIUM AND ALLOYS | 2021年 / 9卷 / 03期
关键词：
A; magnesium; B.TEM; B; SEM; C; segregation; C. Alkaline corrosion; MAGNESIUM ALLOYS; GRAIN-REFINEMENT; MECHANICAL-PROPERTIES; BEHAVIOR; CE; SECTION; WE43; BODY; AZ31; LA;
D O I：
10.1016/j.jma.2020.09.008
中图分类号：
TF [冶金工业];
学科分类号：
0806 ;
摘要：
The effects of Sr additions on the microstructure and corrosion performance of a Mg-Al-RE alloy in 3.5 wt.% NaCl saturated with Mg(OH)(2) have been investigated. Microstructure examination reveals that the Sr addition introduces additional intermetallic phases, refines intermetallic networks and dendritic grains, and improves the network continuity. More Al and rare earth elements can be identified in the intermetallics and grain boundaries or inter-dendrite regions under a transmission electron microscope and secondary electron microscope, respectively. On the Sr-containing intermetallic phases and the refined microstructure, the oxide films become more protective, resulting in more corrosion resistant boundary areas and thus dendrite grain grooves. Hence, the presence of large amounts of intermetallics and boundaries can enhance the corrosion performance of the Mg-Al-RE alloy containing Sr. (C) 2020 Chongqing University. Publishing services provided by Elsevier B.V. on behalf of KeAi Communications Co. Ltd.
引用
收藏
页码：950 / 963
页数：14
相关论文
共 57 条
[1]  
[Anonymous], SAE T J MAT MANUF
[2]   Corrosion resistance of WE43 and AZ91D magnesium alloys with phosphate PEO coatings [J].
Arrabal, R. ;
Matykina, E. ;
Viejo, F. ;
Skeldon, P. ;
Thompson, G. E. .
CORROSION SCIENCE, 2008, 50 (06) :1744-1752
[3]   An investigation of the corrosion mechanisms of WE43 Mg alloy in a modified simulated body fluid solution: The influence of immersion time [J].
Ascencio, M. ;
Pekguleryuz, M. ;
Omanovic, S. .
CORROSION SCIENCE, 2014, 87 :489-503
[4]   Viewpoint - Understanding Mg corrosion in the body for biodegradable medical implants [J].
Atrens, Andrej ;
Johnston, Sean ;
Shi, Zhiming ;
Dargusch, Matthew S. .
SCRIPTA MATERIALIA, 2018, 154 :92-100
[5]   Review of Recent Developments in the Field of Magnesium Corrosion [J].
Atrens, Andrej ;
Song, Guang-Ling ;
Liu, Ming ;
Shi, Zhiming ;
Cao, Fuyong ;
Dargusch, Matthew S. .
ADVANCED ENGINEERING MATERIALS, 2015, 17 (04) :400-453
[6]   Advances in Mg corrosion and research suggestions [J].
Atrens, Andrej ;
Song, Guang-Ling ;
Cao, Fuyong ;
Shi, Zhiming ;
Bowen, Patrick K. .
JOURNAL OF MAGNESIUM AND ALLOYS, 2013, 1 (03) :177-200
[7]   Formulation of corrosion rate of magnesium alloys using microstructural parameters [J].
Bahmani, Ahmad ;
Arthanari, Srinivasan ;
Shin, Kwang Seon .
JOURNAL OF MAGNESIUM AND ALLOYS, 2020, 8 (01) :134-149
[8]  
Bakke P, 2005, MAGNESIUM TECHNOLOGY 2005, P291
[9]   Economical and environmental factors in light alloys automotive applications [J].
Caceres, Carlos H. .
METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE, 2007, 38A (07) :1649-1662
[10]   Corrosion behaviour in salt spray and in 3.5% NaCl solution saturated with Mg(OH)2 of as-cast and solution heat-treated binary Mg-X alloys: X = Mn, Sn, Ca, Zn, Al, Zr, Si, Sr [J].
Cao, Fuyong ;
Shi, Zhiming ;
Song, Guang-Ling ;
Liu, Ming ;
Atrens, Andrej .
CORROSION SCIENCE, 2013, 76 :60-97
123456