考虑摩擦效应的Ti60合金流变曲线修正

王天祥; 鲁世强; 王克鲁; 欧阳德来; 姚泉

doi:10.15980/j.tzzz.2020.07.020

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考虑摩擦效应的Ti60合金流变曲线修正
Flow Curve Correction of Ti60 Alloy Considering Friction Effect
2020年40卷第7期页码：780-783
纸质出版日期： 2020 ，
DOI： 10.15980/j.tzzz.2020.07.020

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[1]王天祥,鲁世强,王克鲁,欧阳德来,姚泉.考虑摩擦效应的Ti60合金流变曲线修正[J].特种铸造及有色合金,2020,40(07):780-783.

Wang Tianxiang, Lu Shiqiang, Wang Kelu, et al. Flow Curve Correction of Ti60 Alloy Considering Friction Effect[J]. Special Casting & Nonferrous Alloys, 2020,40(7):780-783.
[1]王天祥,鲁世强,王克鲁,欧阳德来,姚泉.考虑摩擦效应的Ti60合金流变曲线修正[J].特种铸造及有色合金,2020,40(07):780-783. DOI： 10.15980/j.tzzz.2020.07.020.

Wang Tianxiang, Lu Shiqiang, Wang Kelu, et al. Flow Curve Correction of Ti60 Alloy Considering Friction Effect[J]. Special Casting & Nonferrous Alloys, 2020,40(7):780-783. DOI： 10.15980/j.tzzz.2020.07.020.

摘要

采用Thermecmaster-Z型热加工模拟试验机对变形温度为850～950℃

应变速率为0.001～10s

-1

和真应变为0.51条件下的Ti60合金试样进行热压缩试验

获得该合金在不同条件下的流变曲线。分别采用传统摩擦修正模型和改进摩擦修正模型对实测流变曲线进行摩擦修正。结果表明

摩擦效应对Ti60合金流变应力具有显著影响

通过使材料发生不均匀变形

导致流变应力的实测值高于真实值。与传统摩擦修正模型相比

经改进摩擦模型修正后的流变曲线能更准确地反映Ti60合金的流变应力对真应变的动态响应。随着应变的增加

摩擦效应对流变应力的影响提高。

Abstract

Thermecmast-Z thermal processing simulation machine was used to conduct thermal compression experiments on Ti60 alloy samples under the conditions of deformation temperature of 850～950 ℃

strain rate of 0.001～10 s

-1

and true strain of 0.51

to obtain the measured flow curves of the alloy.The traditional friction correction model and the modified friction correction model were adopted to correct the measured flow curve

respectively.The results show that the friction effect has a significant influence on the flow stress of Ti60 alloy.Through un-even deformation of materials

the measured value of flow stress is higher than the true value.Compared with traditional friction correction

the flow curve corrected by modified-corrected friction can better reflect the dynamic response of the flow stress of Ti60 alloy to the true strain.With the increase of strain

the influence of friction effect on the flow stress becomes more significant.