Tensile property of submicrocrystalline pure Fe produced by HPT-straining

被引：32

作者：

Todaka, Yoshikazu ^{[1
]}

Miki, Yoshii ^{[1
]}

Umemoto, Minoru ^{[1
]}

Wang, Chaohui ^{[2
,3
]}

Tsuchiya, Koichi ^{[4
]}

机构：

[1] Toyohashi Univ Technol, Dept Prod Syst Engn, Tempaku Ku, Hibarigaoka 1-1, Aichi 4418580, Japan

[2] Toyohashi Univ Technol, Aichi 4418580, Japan

[3] Miyazaki Seiko Co Ltd, Nagoya, Aichi 4540834, Japan

[4] Natl Inst Mat Sci, Tsukuba, Ibaraki 305, Japan

来源：

NANOMATERIALS BY SEVERE PLASTIC DEFORMATION IV, PTS 1 AND 2 | 2008年 / 584-586卷

关键词：

high-pressure torsion (HPT); iron; tensile property; grain refinement; severe plastic deformation (SPD);

D O I：

10.4028/www.scientific.net/MSF.584-586.597

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

The microstructure and the mechanical properties of pure Fe after HPT-straining at a rotation-speed of 0.2 rpm under a compression pressure of 5 GPa were investigated. The elongated grains with 300 nm thick and 600 nm long were observed at r = 1.5 mm away from the disk center regions after HPT-straining for 5 turns (epsilon(eq) = 45). The obtained Vickers microhardness in the submicrocrystalline Fe after 5 turns was around H nu 3.6 GPa. The engineering tensile strength and total elongation of the HPT-processed Fe for 10 turns were 1.9 GPa and 30 %. These facts suggest that HPT-straining leads to significant refinement of microstructure and increase in strength with good ductility.

引用

页码：597 / 602

页数：6

共 34 条

[1] DEFORMATION OF PLASTICALLY NON-HOMOGENEOUS MATERIALS [J].