Microstructure and Properties of Continuous Directional Solidification Be-Ag-Cu Alloy

Liu Guanglin1; Cao Jun2; Ding Yutian2; Feng Cunli1; Yao Zhen1; Qiu Hongwei1; Jie Mingshan1

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Microstructure and Properties of Continuous Directional Solidification Be-Ag-Cu Alloy
Issue 6, Pages: 465-467(2007)
Published： 2007 ，
DOI：

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[1]刘广林,曹军,丁雨田,封存利,姚桢,邱宏卫,介明山.连续定向凝固Be-Ag-Cu合金的组织和性能[J].特种铸造及有色合金,2007(06):465-467+408-409.

Liu Guanglin1, Cao Jun2, Ding Yutian2, et al. Microstructure and Properties of Continuous Directional Solidification Be-Ag-Cu Alloy. [J]. Special Casting & Nonferrous Alloys (6):465-467(2007)
[1]刘广林,曹军,丁雨田,封存利,姚桢,邱宏卫,介明山.连续定向凝固Be-Ag-Cu合金的组织和性能[J].特种铸造及有色合金,2007(06):465-467+408-409. DOI：

Liu Guanglin1, Cao Jun2, Ding Yutian2, et al. Microstructure and Properties of Continuous Directional Solidification Be-Ag-Cu Alloy. [J]. Special Casting & Nonferrous Alloys (6):465-467(2007) DOI：

摘要

研究了连续定向凝固Be-Ag-Cu合金棒材的铸态及冷加工后微观组织、力学性能和电学性能。定向凝固Be-Ag-Cu合金棒具有纵向连续纤维晶组织

与连续定向凝固单晶铜杆相比

Be-Ag-Cu合金具有高的强度、较高的塑性和电导率等特点。静拉伸断口形貌观察表明

定向凝固Be-Ag-Cu合金棒穿晶韧性断裂

其微观断口均呈山峰状

试样的宏观断口呈扁形且存在滑移线。经过大变形冷加工后Be-Ag-Cu合金具有致密的纤维组织结构

电导率略有下降

强度显著增加。

Abstract

The microstructure

mechanical properties and electric properties of as-cast and cold worked Be-Ag-Cu alloy rod in directional continuous solidification have been investigated.Directional solidification Be-Ag-Cu alloy rod possesses continuous fibrous structure

which exhibits higher strength and plasticity as well as high electric conductivity compared with continuous directional solidification single crystal copper bar.Fracture morphology observation shows that the crack is characterized by transgranular ductile crack

showing peak-like in micro-fracture and oblates with many sliding lines in macro-fracture.The compact fibrous structure in the Be-Ag-Cu alloy rod can be observed

meanwhile the electric conductivity is slightly decreased and strength is greatly improved after severe plastic deformation.