Increasing toughness by promoting discontinuous precipitation in Cu-Ni-Si alloys

被引：26

作者：

Han, Seung Zeon ^{[1
]}

Lee, Jehyun ^{[2
]}

Goto, Masahiro ^{[3
]}

Lim, Sung Hwan ^{[4
]}

Ahn, Jee Hyuk ^{[1
]}

Kim, Sangshik ^{[5
]}

Kim, Kwangho ^{[6
]}

机构：

[1] Korea Inst Mat Sci, Struct Mat Div, Chang Won, South Korea

[2] Changwon Natl Univ, Dept Mat Sci & Engn, Chang Won, South Korea

[3] Oita Univ, Dept Mech Engn, Oita, Japan

[4] Kangwon Natl Univ, Dept Adv Mat Sci & Engn, Chunchon, South Korea

[5] Gyeongsang Natl Univ, Dept Mat Engn & Convergence Technol, ReCAPT, Chinju, South Korea

[6] Pusan Natl Univ, Sch Mat Sci & Engn, Busan, South Korea

来源：

PHILOSOPHICAL MAGAZINE LETTERS | 2016年 / 96卷 / 05期

基金：

新加坡国家研究基金会;

关键词：

Copper alloys; precipitation; high toughness; impact test; ELECTRICAL-PROPERTIES; HEAT-TREATMENT; SC ALLOY; MICROSTRUCTURE; BEHAVIOR; ADDITIONS; ALUMINUM; KINETICS; TENSILE;

D O I：

10.1080/09500839.2016.1189099

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The influence of precipitation morphology, including continuous precipitation (CP) and discontinuous precipitation (DP), on the mechanical behaviour of Cu-Ni-Si alloys was studied. The Cu-6Ni-1.5Si (in wt%) alloy was solution heat treated at 980 degrees C for 2h and aged at 500 degrees C for 0.5 and 3h to produce CP and DP structures. The DP specimen showed an abnormal increase in tensile ductility with increasing strain rate, unlike the CP counterpart. The impact toughness of the DP specimen was 1.6 times greater than that of CP specimen. The fracture mode in DP specimen was mostly dimpled rupture, while the mixed mode of cleavage fracture and dimpled rupture was noted on the CP specimen.

引用

页码：196 / 203

页数：8

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