Influences of laser powers on microstructure and properties of the coatings on the AZ91HP magnesium alloy

被引：8

作者：

Gao, Yali ^{[1
]}

Xiong, Dangsheng ^{[1
]}

Wang, Cunshan ^{[2
]}

Chen, Yongzhe ^{[2
]}

机构：

[1] Nanjing Univ Sci & Technol, Sch Mat Sci & Engn, Nanjing 210094, Peoples R China

[2] Dalian Univ Technol, State Key Lab Mat Modificat, Dalian 116024, Peoples R China

来源：

ACTA METALLURGICA SINICA-ENGLISH LETTERS | 2009年 / 22卷 / 03期

关键词：

Magnesium alloy; Al-Si alloy; Laser cladding; Laser power;

D O I：

10.1016/S1006-7191(08)60085-X

中图分类号：

TF [冶金工业];

学科分类号：

0806 ;

摘要：

Al-Si alloy coatings were prepared on AZ91HP magnesium alloy by broad-beam laser cladding; the influences of the powers on the microstructure and properties of the coatings were discussed. It was found that the microstructure of the coatings at the powers of 3 and 3.5 kW was characterized by Mg2Si dendrites, and needle-like Mg2Al3 (hcp) dispersing in the Mg17Al12 matrix, whereas the coating at the power of 2.5 kW was composed of the petal-like Mg2Al3 (fcc) as well as the needle-like Mg2Al3 (hcp). The coating at the power of 4 kW appeared as alpha-Mg solid solution and Mg2Si, Mg17Al12, as well as Mg2Al3 (hcp). The coatings with the powers of 3 and 3.5 kW exhibited higher microhardness and better wear resistance because of more Mg2Si and Mg17Al12. However, the coating at the power of 2.5 kW displayed better corrosion resistance.

引用

页码：167 / 173

页数：7

共 11 条

[1]

BIAN FG, 2004, MAT PROT, V35, P1

[2]

GALUN R, 1998, MAGNESIUM ALLOYS THE, P439

[3]

GAO B, 2003, MAT PROT, V36, P1

[4] Broad-beam laser cladding of Al-Si alloy coating on AZ91HP magnesium alloy [J].

Gao, Yali ;

Wang, Cunshan ;

Lin, Qi ;

Liu, Hongbin ;

Yao, Man .

SURFACE & COATINGS TECHNOLOGY, 2006, 201 (06) :2701-2706

[5]

Ignat S, 2004, APPL SURF SCI, V225, P124, DOI [10.1016/j.apsusc.2003.09.043, 10.1061/j.apsusc.2003.09.043]

[6]

[李宝东 Li Baodong], 2002, [材料保护, Materials Protection], V35, P1

[7]

[李宁 Li Ning], 2002, [电镀与涂饰, Electroplationg & Finishing], V21, P39

[8] Effect of laser surface melting on corrosion and wear resistance of a commercial magnesium alloy [J].

Majumdar, JD ;

Galun, R ;

Mordike, BL ;

Manna, I .

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2003, 361 (1-2) :119-129

[9]

SHU DL, 1999, METAL MECH PROPERTY, P171

[10] LASER CLADDING OF MG-AL ALLOYS [J].

WANG, AA ;

SIRCAR, S ;

MAZUMDER, J .

JOURNAL OF MATERIALS SCIENCE, 1993, 28 (19) :5113-5122

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