|
摘要：
|
|
利用Thermecmastor-Z热模机对经过搅熔铸造法-半固态等温热处理法制备的SiCp/AZ61复合材料半固态坯料进行触变压缩实验。重点分析了SiC颗粒体积分数对真实应力和微观组织的影响。研究表明:在压缩变形前后的SiCp/AZ61复合材料中,SiC颗粒增强相主要位于晶粒晶界处;SiC颗粒增强相体积分数越大,SiCp/AZ61复合材料在半固态条件下的真实应力越大、组织颗粒越细小,塑性变形越明显。
|
|
Thixotropic compression tests on semi-solid billets of SiCp/AZ61 composites fabricated with the method of stirring-melt casting and isothermal heat treatment were carried out by the Thermecmastor-Z dynamic material testing machine.Effects of SiC particles volume fraction on the true stress and microstructure were emphatically analyzed.The results show that SiC particles mainly located between grain boundary before and after compression tests of SiCp/AZ61 composite.In the meantime,the higher true stress and the finer microstructure as well as the clearer plastic deformation are found with the increase of SiC particles reinforcement volume fraction in semi-solid state.
|
|
基金项目：
|
|
国家自然科学基金资助项目(50465003,50765005);;
08年江西省新余市自然科学基金资助项目(2008zrkxkxjj02);;
08年校级重点课题资助项目(XJ0805)
|
|
作者简介：
|
|
|
|
参考文献：
|
[1]Hai Z Y,Xing Y L.Review of recent studies in magnesiummatrix composites[J].Journal of Materials Science,2004,39(20):6153-6171.
[2]张发云,闫洪,周天瑞,等.金属基复合材料制备工艺的研究进展[J].锻压技术,2006,31(6):100-105.
[3]郭钧,丁志勇,谢水生,等.半固态Al-26.6%Si合金的变形行为[J].中国有色金属学报,2000,S1(10):116-119.
[4]Kang C G,Choi J S,Kim K H.The effect of strain rate onmacroscopic behavior in the compression forming of semi-solidaluminum alloy[J].Journal of Materials Processing Tech-nology,1999,88:159-168.
[5]王平,董微国,路贵民,等.半固态A356合金的压缩变形行为[J].东北大学学报:自然科学版,2003,24(6):586-588.
[6]姜巨福,唐全波,罗守靖,等.变形的AZ91D镁合金半固态等温压缩的力学行为[J].材料科学与工艺,2007,15(4):166-169.
[7]杜之明,程远胜,罗守靖.Al2O3sf.SiCp/Al复合材料的压缩变形力学行为及机制[J].材料研究学报,2005,19(2):218-224.
[8]Chen Tijun,Hao Yuan,Sun Jun.Compressive deformationof semi-solid SiCp/ZA27 composites[J].Trans.NonferrousMet.Soc.China,2003,13(5):164-170.
[9]罗守靖,姜巨福,滕东东,等.SiCP/2024复合材料在半固态下流变行为的研究[J].机械工程学报,2002,38(12):79-83.
[10]毛卫民,殷爱美,钟雪友.半固态AZ91D镁合金的压缩变形研究[J].金属学报,2005,41(5):539-544.
[11]Yan Hong,Zhou Bingfeng.Thixotropic deformation behav-ior of semi-solid AZ61 magnesium alloy during compressionprocess[J].Materials Science and Engineering,2006,132(1-2):179-182.
[12]Kima W Y,Kangb C G,Kimb B M.Deformation behaviorof wrought aluminum alloys in incremental compression ex-periment with a closed die[J].Journal of Materials Process-ing Technology,2007,191(13):372-376.
[13]Iwasaki H,Mori T,Maabuchi M,et al.Shear deformationbehavior of Al-5%Mg in semi-solid state[J].Acta.Ma-ter.1998,46(18):6351-6360.
[14]薛勇,张治民,郎利辉,等.AZ91D镁合金高温压缩变形行为[J].锻压技术,2009,34(1):135-138.
[15]陈礼清,董群,郭金花,等.TiC/AZ91D镁基复合材料高温压缩变形行为[J].金属学报,2005,41(3):326-332.
[16]李淑波,郑明毅,甘为民,等.SiCw/AZ91镁基复合材料及AZ91镁合金的高温变形行为[J].复合材料学报,2005,22(3):103-108.
[17]王建金.SiC_p/AZ61复合材料触变塑性成形本构关系及数值模拟研究[D].南昌:南昌大学,2008.
[18]张发云,闫洪,陈国香,等.SiCP/AZ61镁基复合材料制备工艺和性能的研究[J].铸造,2007,56(6):611-614.
|
|
服务与反馈：
|
|
【文章下载】【加入收藏】
|
|
|
|
