典型文献
Insights into the rheological modeling of semi-solid metals:Theoretical and simulation study
文献摘要：
The power law model is the most widely used model for the rheological behavior of semi-solid met-als(SSMs)in the numerical simulation of semi-solid processing.However,it is still not known why the anomalous negative flow exponent exists in the power law model for SSMs and its influence on the simu-lation.In this research,the rheological behavior of semi-solid Al-7Si-0.3Mg aluminum alloy is experimen-tally studied followed by modeling.The power law model fitting results show flow curves deviate from the experimental data and negative flow exponents,which are physically nonsensical and inapplicable to the simulation of SSMs flow proved by hydrodynamic analysis.This drawback of the power law model stems from neglecting the yield stress of SSMs.By contrast,the model referring Herschel-Bulkley(HB)theory which takes yield stress into consideration has reasonable flow exponent and yields good agree-ment between the fitting and experimental results.Furthermore,the simulation of die filling process is conducted,suggesting that the power law model over-optimistically predicts the tendency of blistering and misrun defects at low temperature and high filling velocity during semi-solid processing.
文献关键词：
中图分类号：
作者姓名：
Zhen Ma;Huarui Zhang;Hanwei Fu;Yanzhao Yang;Jianji Wang;Ming Du;Hu Zhang
作者机构：
School of Materials Science and Engineering,Beihang University,Beijing 100191,China;FAW-VOLKSWAGEN Automobile Co.,Ltd,Qingdao 266000,China;Ningbo Institute of Technology,Beihang University,Ningbo 315832,China
文献出处：
引用格式：
[1]Zhen Ma;Huarui Zhang;Hanwei Fu;Yanzhao Yang;Jianji Wang;Ming Du;Hu Zhang-.Insights into the rheological modeling of semi-solid metals:Theoretical and simulation study)[J].材料科学技术（英文版）,2022(05):182-192
A类：
nonsensical,optimistically,blistering,misrun
B类：
Insights,into,rheological,modeling,semi,solid,metals,Theoretical,simulation,study,power,law,most,widely,used,behavior,SSMs,numerical,processing,However,still,not,known,why,anomalous,negative,flow,exists,its,influence,this,research,7Si,3Mg,aluminum,alloy,tally,studied,followed,by,fitting,results,show,curves,deviate,from,experimental,data,exponents,which,are,physically,inapplicable,proved,hydrodynamic,analysis,This,drawback,stems,neglecting,stress,By,contrast,referring,Herschel,Bulkley,HB,theory,takes,consideration,has,reasonable,yields,good,agree,between,Furthermore,filling,conducted,suggesting,that,over,predicts,tendency,defects,temperature,high,velocity,during
AB值：
0.501497
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