Effect of Si and Ti on dynamic recrystallization of high-performance Cu-15Ni-8Sn alloy during hot deformation

被引：38

作者：

Zhao, Chao ^{[1
]}

Wang, Zhi ^{[1
,2
]}

Pan, De-qing ^{[1
]}

Li, Dao-xi ^{[1
]}

Luo, Zong-qiang ^{[1
,2
]}

Zhang, Da-tong ^{[1
,2
]}

Yang, Chao ^{[1
,2
]}

Zhang, Wei-wen ^{[1
,2
]}

机构：

[1] South China Univ Technol, Guangdong Key Lab Proc & Forming Adv Metall Mat, Guangzhou 510640, Guangdong, Peoples R China

[2] South China Univ Technol, Sch Mech & Automot Engn, Guangzhou 510640, Guangdong, Peoples R China

来源：

TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA | 2019年 / 29卷 / 12期

关键词：

Cu-15Ni-8Sn alloy; discontinuous dynamic recrystallization; hot compression; hot extrusion; mechanical properties; HIGH-STRENGTH; PROCESSING MAPS; BEHAVIOR; MICROSTRUCTURE; EXTRUSION; COMPRESSION; WORKING;

D O I：

10.1016/S1003-6326(19)65163-0

中图分类号：

TF [冶金工业];

学科分类号：

0806 ;

摘要：

Effect of Si and Ti on dynamic recrystallization (DRX) of Cu-15Ni-8Sn alloy was studied using hot compression tests over deformation temperature range of 750-950 degrees C and strain rate range of 0.001-10 s(-1). The results show that the dynamic recrystallization behavior during hot deformation is significantly affected by the trace elements of Si and Ti. The addition of Si and Ti promotes the formation of Ni16Si7Ti6 particles during hot deformation, which promotes the nucleation of dynamic recrystallization by accelerating the transition from low-angle boundaries (LABs) to high-angle boundaries (HABs). Ni16Si7Ti6 particles further inhibit the growth of recrystallized grains through the pinning effect. Based on the dynamic recrystallization behavior, a processing map of the alloy is built up to obtain the optimal processing parameters. Guided by the processing map, a hot-extruded Cu-15Ni-8Sn alloy with a fine-grained microstructure is obtained, which shows excellent elongation of 30% and ultimate tensile strength of 910 MPa.

引用

页码：2556 / 2565

页数：10

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