Enhanced grain refinement by mechanical twinning in a bulk Cu-30 mass% Zn during multi-directional forging

被引：51

作者：

Miura, H. ^{[1
]}

Nakao, Y. ^{[1
]}

Sakai, Taku ^{[1
]}

机构：

[1] Univ Electrocommun, Dept Mech Engn & Intelligent Syst, Tokyo 182, Japan

来源：

MATERIALS TRANSACTIONS | 2007年 / 48卷 / 09期

关键词：

twinning; multi-directional forging; ultrafine grain; copper-zinc alloy;

D O I：

10.2320/matertrans.MRP2007123

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

A bulk Cu-Zn alloy was multi-directionally forged at 77 K and 300 K to a cumulative strain of Sigma Delta epsilon = 6.0. With increasing strain, the initial grains subdivided gradually to ultrafine grains. Mechanical twins enhanced the grain fragmentation. The formed twins were further subdivided by the other variants of twins. The grain size obtained at Sigma Delta epsilon = 6.0 was about 17 nm at 77 K and 26 nm at 300 K.

引用

页码：2539 / 2541

页数：3

共 12 条

[1]

Humphreys F.J., 2004, RECRYSTALLIZATION RE

[2] An investigation of microstructural evolution during equal-channel angular pressing [J].

Iwahashi, Y ;

Horita, Z ;

Nemoto, M ;

Langdon, TG .

ACTA MATERIALIA, 1997, 45 (11) :4733-4741

[3] Nano-sized twins induce high rate sensitivity of flow stress in pure copper [J].

Lu, L ;

Schwaiger, R ;

Shan, ZW ;

Dao, M ;

Lu, K ;

Suresh, S .

ACTA MATERIALIA, 2005, 53 (07) :2169-2179

[4]

MIURA H, 2004, P ISUGUS2 GEEL AUSTR

[5]

NAKAO Y, 2007, UNPUB

[6] Microstructural evolution in copper during multi-directional forging at 77 K and its recrystallization behavior [J].

Nakao, Yoshifumi ;

Miura, Hiromi ;

Sakai, Taku ;

Wada, Masahiko .

JOURNAL OF THE JAPAN INSTITUTE OF METALS, 2006, 70 (05) :434-439

[7]

Narita N, 1992, Dislocations in Solids, V9, P135

[8] Studies of severe plastic deformation conditions for amorphous and nanocrystalline structures formation in Ti-Ni based alloys [J].

Prokoshkin, SD ;

Khmelevskaya, IY ;

Dobatkin, SV ;

Tatyanin, EV ;

Trubitsyna, IB .

NANOMATERIALS BY SEVERE PLASTIC DEFORMATION, 2006, 503-504 :481-486

[9] Novel ultra-high straining process for bulk materials - Development of the accumulative roll-bonding (ARB) process [J].

Saito, Y ;

Utsunomiya, H ;

Tsuji, N ;

Sakai, T .

ACTA MATERIALIA, 1999, 47 (02) :579-583

[10]

SAKAI T, 2004, P 25 RIS INT S MAT S, P509

← 1 2 →