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1、第27卷第5期粉末冶金技術(shù)Vo1．27．NO．52009年10月PowderMetallurgyTechnology0ct．2009孔隙度對燒結(jié)不銹鋼纖維多孔材料壓縮性能的影響米王建永一湯慧萍一朱紀磊喬吉超藏純勇敖慶波李程(西北有色金屬研究院金屬多孔材料國家重點實驗室，西安710016)摘要：采用絲徑為1001xm的不銹鋼纖維經(jīng)松裝燒結(jié)工藝制備了孔隙度在70％～95％之間的金屬纖維多孔板材。在MTS858材料試驗機上檢測壓縮性能，結(jié)果表明：孔隙度在82．8％以下的試件的面內(nèi)應(yīng)力應(yīng)變曲線大致分為三個階段，應(yīng)變很低情況下的線性彈性區(qū)
2、、屈服平臺區(qū)和應(yīng)力急劇增大情況下的致密化區(qū)，其中屈服平臺區(qū)較長，說明該材料具有較強的能量吸收能力；隨著孔隙度的增加，不銹鋼纖維多孔材料的卸載模量、屈服強度減小，其中孔隙度為70％的燒結(jié)不銹鋼纖維多孔材料的平均卸載模量為5．2GPa，平均屈服強度達到了23MPa；孔隙度大于90．1％的試件屈服強度很低，能量吸收能力很小。關(guān)鍵詞：金屬纖維多孑L材料；壓縮性能；孔隙度；屈服強度；超輕金屬材料Effectofporosityoncompressivepropertiesofporoussinteredstainlesssteelfibe
3、rmediaWangJianyong，TangHuiping，ZhuJilei，QiaoJichao，ZangChunyong，AoQingbo，LiCheng(NorthwestInstituteforNon—ferrousMetalResearch，StateKeyLaboratoryofPorousMetalMaterials，Xi’an710016，China)Abstract：Poroussintered316LstainlesssteelfibersoflO0p~mindiameterwerefabricatedby
4、loosesinteringtechnology，withporosityfrom70％一95％．AndcompressivepropertiesoftheporoussinteredstainlesssteelfibermediawereinvestigatedbyusingMTS858systematroomtemperature．Theresultsindicatethatthecompressivestress—straincurvesofporoussinteredstainlesssteelfibermedia．wi
5、thporositylessthan82．8％exhibitsthreedistinctregions(threedeformationstages)undercompressiveloading，i．e．，elasticstage，aplateaustagethatoccursafteryieldingandfinaldensificationregionwherethestressincreasesdrastically．Moreover，compressivestress—straincurvesoftheporoussi
6、nteredstainlesssteelfibermediapresentsmoothandlongplateaustages．Therefore，theporoussinteredstainlesssteelfibermediashowexcellentenergyabsorptioncapacity．Byincreasingporosity，itisobviousthatthecompressiveyieldstrengthslumps．Moreover，theunloadedYoung’Smodulusgraduallyd
7、ecreaseswithincreaseofporosity．ItcanbefoundthattheaverageunloadedYoung’Smodulusandaveragecompressiveyieldstrengthoftheporoussinteredstainlesssteelfibermediawithporosityof70％is5．2GPaand23MPa．Instead，whenporosityismorethan90．1％．theenergyabsorptioncapacityoftheporoussin
8、teredstainlesssteelfibermediaisverylittle．Keywords：metalfibrematerial；compressiveproperty；porosity；yieldstrength；ultra—lightporousm
