CAJ | 학술논문

对碳化硅颗粒增强铝基复合材料进行等通道挤扭实验和模拟，研究粉体在变形过程中的致密行为。结果表明，SiCp/Al复合粉末材料在等通道转角挤扭工艺中通过3个剪切面和7个变形区能得到有效致密。ECAPT 过程中材料所处的球应力和切应力的叠加状态，是材料孔隙得到有效致密的关键。变形过程中，S iC颗粒被剪切细化，促进了团簇颗粒的分散和孔隙的致密。T E通道的剪切作用能使S iC颗粒进一步细化，但材料的整体致密度略有下降。
대탄화규과립증강려기복합재료진행등통도제뉴실험화모의，연구분체재변형과정중적치밀행위。결과표명，SiCp/Al복합분말재료재등통도전각제뉴공예중통과3개전절면화7개변형구능득도유효치밀。ECAPT 과정중재료소처적구응력화절응력적첩가상태，시재료공극득도유효치밀적관건。변형과정중，S iC과립피전절세화，촉진료단족과립적분산화공극적치밀。T E통도적전절작용능사S iC과립진일보세화，단재료적정체치밀도략유하강。
ECAPT experiment and finite element simulation were carried out for the SiCp/Al metal matrix composite . The densi-fication behavior has been studied . The results show that the SiCp/Al metal matrix composite could be compact after three shear-ing surface and seven deformed zones . The analysis shows that the key factor to obtain high density is the composite of large shear plastic deformation and high hydrostatic stress during ECAPT . According the the shearing , the SiC particle was refined , which contributed to the scatter of the cluster and the densification of pore . The shearing of TE also can refine the SiC particle further , while the density of the composite decreases a little .