Using friction stir processing to produce ultrafine-grained microstructure in AZ61 magnesium alloy

被引：39

作者：

Du Xing-hao ^{[1
]}

Wu Bao-lin ^{[1
]}

机构：

[1] Shenyang Inst Aeronaut Engn, Dept Mat Engn, Shenyang 110034, Peoples R China

来源：

TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA | 2008年 / 18卷 / 03期

基金：

中国国家自然科学基金;

关键词：

magnesium based alloys; AZ61; alloy; friction stir processing; ultrafine-grained microstructure;

D O I：

10.1016/S1003-6326(08)60098-9

中图分类号：

TF [冶金工业];

学科分类号：

0806 ;

摘要：

In order to obtain fine-microstructure magnesium alloys with superior mechanical properties, AZ61 alloy was processed by friction stir processing(FSP) combined with rapid heat sink. It is found that ultra fine-grained microstructure with average size less than 300 nm is observed in the resultant AZ61 alloy. The mean microhardness of the ultra-fine region reaches Hv120-130, two times higher than that of AZ61 substrate. All these results demonstrate clearly that under a cooling rate high enough, ultra-fine structure in AZ61 alloy with superior mechanical properties can be produced by one pass FSP via dynamic recrystallization.

引用

页码：562 / 565

页数：4

共 26 条

[1]

Arbegast WJ, 2003, HOT DEFORMATION OF ALUMINUM ALLOYS III, P313

[2]

Benavides S, 2000, ULTRAFINE GRAINED MATERIALS, P155

[3] Low-temperature superplasticity and internal friction in microcrystalline Mg alloys processed by ECAP [J].

Chuvil'deev, VN ;

Nieh, TG ;

Gryaznov, MY ;

Sysoev, AN ;

Kopylov, VI .

SCRIPTA MATERIALIA, 2004, 50 (06) :861-865

[4]

Forst H. J., 1982, DEFORMATION MECH MAP, P21

[5] Deformation behavior and controlling mechanisms for plastic flow of magnesium and magnesium alloy [J].

Galiyev, A ;

Sitdikov, O ;

Kaibyshev, R .

MATERIALS TRANSACTIONS, 2003, 44 (04) :426-435

[6]

KAIBYSHEV R, 2001, MAT T, V42, P1928

[7]

Kainer K.U., 2003, MAGNESIUM ALLOYS TEC

[8] Superplasticity in thin magnesium alloy sheets and deformation mechanism maps for magnesium alloys at elevated temperatures [J].

Kim, WJ ;

Chung, SW ;

Chung, CS ;

Kum, D .

ACTA MATERIALIA, 2001, 49 (16) :3337-3345

[9] Friction stir process as a new manufacturing technique of ultrafine grained aluminum alloy [J].

Kwon, YJ ;

Saito, N ;

Shigematsu, I .

JOURNAL OF MATERIALS SCIENCE LETTERS, 2002, 21 (19) :1473-1476

[10]

LOWE TC, 2000, INVESTIGATIONS APPL, P1

← 1 2 3 →