Mechanical Properties of Aluminum Alloy at Elevated Temperature in Squeezing Casting

Jia Zhanzhan1; Zhu Wei1; Han Zhiqiang1; Zhao Haidong2; Liu Baicheng1

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Mechanical Properties of Aluminum Alloy at Elevated Temperature in Squeezing Casting
Issue 2, Pages: 130-133(2008)
Published： 2008 ，
DOI：

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[1]贾湛湛,朱维,韩志强,赵海东,柳百成.挤压铸造铝合金高温力学行为试验[J].特种铸造及有色合金,2008(02):130-133+80.

Jia Zhanzhan1, Zhu Wei1, Han Zhiqiang1, et al. Mechanical Properties of Aluminum Alloy at Elevated Temperature in Squeezing Casting. [J]. Special Casting & Nonferrous Alloys (2):130-133(2008)
[1]贾湛湛,朱维,韩志强,赵海东,柳百成.挤压铸造铝合金高温力学行为试验[J].特种铸造及有色合金,2008(02):130-133+80. DOI：

Jia Zhanzhan1, Zhu Wei1, Han Zhiqiang1, et al. Mechanical Properties of Aluminum Alloy at Elevated Temperature in Squeezing Casting. [J]. Special Casting & Nonferrous Alloys (2):130-133(2008) DOI：

摘要

为获得可用于挤压铸造过程凝固壳变形与压力传递模拟计算的材料力学行为数据

利用Gleeble-1500D数控式动态热-力学物理模拟试验机

对不同压力（25、50、75MPa）下制备的挤压铸造铝合金材料的力学行为进行了测试

获得了给定温度（250、300、350、400、450、500℃）和应变速率（0.100s-1、0.010s-1、0.001s-1）条件下的一系列真应力-真应变曲线

并分析了温度、应变速率和挤压铸造压力对材料高温力学行为的影响。结果表明

材料的流变应力随温度的升高而减小、随应变速率的增大而增大。挤压铸造压力对材料的高温力学性能有影响

较高挤压力下获得的材料具有较大的流变应力值。

Abstract

A series of true stress via true strain curves were mapped under given temperatures

including 250

300

350

400

450

500 ℃

and strain rate

including 0.1

0.01.0.001 s-1

based on the measurements of mechanical properties of squeezing casting aluminum alloy with different pressures

such as 20

75 MPa by means of digital-controlled thermal-mechanical physical analogue machine Gleeble-1500D.The effects of temperature

strain rate and squeezing pressure on the mechanical properties of the aluminum alloy at elevated temperature have been examined.The results indicate that the flow stress of the aluminum alloy is decreased with the increase of the temperature and is increased with the increase of the strain rate.The higher flow stress can be obtained with a higher squeezing pressure

exhibiting the effects of squeezing pressure on the mechanical properties of the aluminum alloy at elevated temperature.