Microstructural and Hardness Study of Pulsed Nd:YAG Laser Surface Alloyed Aluminum with Iron

被引：9

作者：

Ansari, Mohammad ^{[1
]}

Soltani, Reza ^{[1
]}

Sohi, Mahmoud Heydarzadeh ^{[1
]}

Valefi, Zia ^{[2
]}

机构：

[1] Univ Tehran, Coll Engn, Sch Met & Mat Engn, POB 11155-4563, Tehran, Iran

[2] Malek Ashtar Univ Technol, Tehran, Iran

来源：

METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE | 2016年 / 47A卷 / 04期

关键词：

INTERMETALLIC COMPOUND; MOLTEN ALUMINUM; SOLID IRON; AL; RESISTANCE; POWDER; LAYERS;

D O I：

10.1007/s11661-015-3320-7

中图分类号：

T [工业技术];

学科分类号：

120111 [工业工程];

摘要：

In the present study, the feasibility of the formation of surface layers containing hard iron aluminides on AA6061-T6 aluminum via pre-plasma spraying with iron and subsequently double surface melting by pulsed Nd:YAG laser is studied. The effects of single and double laser surface melting on microstructure, phase formation, and hardness of the treated layers are examined. Single-step laser treatment resulted in the presence of undissolved iron particles surrounded by lump-like Al5Fe2 and needle-like Al3Fe intermetallic compounds. Double laser surface melting dissolved the retained undissolved irons and resulted in the formation of Al-Al3Fe eutectic structure. Microhardness profiles along cross section and top surface of the treated layers indicated that laser surface alloying with iron enhanced the hardness of the aluminum to more than twice of that of the base material.

引用

页码：1698 / 1704

页数：7

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