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21 5 Vol.21No.52007 10 CHINESEJOURNALOFMATERIALSRESEARCHOctober2007 Fe–25Mn–6Si–7Cr ∗ 1Æ 21. 2111672. 710049 Fe–25Mn–6Si–7Cr , Æ , 0Cr13Ni5Mo . ,Fe–25Mn–6Si–7Cr , 0Cr13Ni5Mo, . ,Fe–25Mn–6Si–7Cr , , !TG115 #!1005-3093(2007)05-0531-06DamagebehaviorofFe–25Mn–6Si–7CrshapememoryalloyinmultiphaseflowcontainingsandWANGZaiyou1∗∗ZHUJinhua21.SchoolofMaterialsEngineering,NanjingInstituteofTechnology,Nanjing2111672.StateKeyLaboratoryforMechanicalBehaviorofMaterials,XianJiaotongUniversity,Xian710049*SupportedbyNationalNaturalScienceFoundationofChina(No.59831030),NaturalScienceFoundationofJiangsuProvince(No.BK2005112)andNaturalScienceResearchProjectofCollegesandUniversitiesofJiangsuProvince(No.05KJD430082).ManuscriptreceivedOctober20,2006;inrevisedformMay21,2007.**Towhomcorrespondenceshouldbeaddressed,Tel:(0)13675148431,E–mail:wzaiyou@njit.edu.cnABSTRACTAbrasionresistanceandcavitation–abrasionresistanceofFe–25Mn–6Si–7Crshapemem-oryalloywereinvestigatedbycomparisonwith0Cr13Ni5Mostainlesssteelappliedinhydraulicturbinevanesusingarotatingdiscrig.BasedonSEMobservationsoferodedsurfaceaswellassimulativemea-surementsofplough–cuttingresistantcapacityWpandlocalizedsurfacelayerelasticityheforthetestedalloys,anattempthasbeenmadetodiscussthefailuremechanismandfactorscharacterizingtheresistance.TheresultsshowthatthefailuremechanismofFe–25Mn–6Si–7Crshapememoryalloyisplough–cuttingofsandparticlesinabrasionprocessandcavitation–abrasionprocess.TheresistanceoftheFe–25Mn–6Si–7CrshapememoryalloyisbetterthanthatofthestainlesssteelduetoitsbetterelasticityheandcapacityWp.ItismainlyattributedtotheexcellentelasticityhethatinfluenceofvelocityondamageoftheFe–25Mn–6Si–7Crshapememoryalloyanditscavitation–sandabrasioninteractionalloyarelow.KEYWORDSmaterialsfailureandprotection,Fe–25Mn–6Si–7Crshapememoryalloy,failuremech-anism,abrasionresistanceandcavitationerosionresistance , $, ! % * & # No.59831030! & # No.BK2005112 & # ÆNo.05KJD4300827’( $.2006%10)20 #2007%5)21 $#. & :!* ’%+ & ’!.# $( (! ) ,%&’)-(, *+,. #/-#.$.)/’! + * 0),1 $$* +%( (& 0)%- ’, (-$+(2.NiTi,0.-%/* $( .&Æ$$& /0#100Cr13Ni5Mo[1],12’3()* ,32 0 + * .Fe–Mn–Si3,0.-%/#45%532 21 532 21 532 21 +$$4Æ$$[2,3],12,TiNi,0.-%/!- ,&)65. $([4]6* $([5,6] +$$4Æ$$& /0#10 /* .*4/Fe–25Mn–6Si–7Cr,0.-%/6 #100Cr13Ni5Mo1 + 2,&5)7 *+75/, .13456-6 :#100Cr13Ni5Mo) ,0 ZG–0.02578#8.9Fe–25Mn–6Si–7Cr,0.-%/,9 718:;/8.-60//875=12:(998105034710min 5);#100Cr13Ni5Mo :;6(2:;?α32,,0.-%/Fe–25Mn–6Si–7Cr%/)6(732, )@6+ $(=081.,&5)6 *+/61?@ A .GKMS–45;=B-6 475,/851=.B4,AB)0◦,;=B-6 (/8%=.B ,069:C4=[6]; /66 % ’%+ /6 ;410:? =.B%@)16mm 6CÆ,0? =.BÆ,& %/6+= .7. ) % ./+=6130m·s−124,DE?D2?F+=, ,, @45m·s−1,9/6+=$A)34m·s−1645m·s−1;1G 28; .)-6 E , Æ9H@ BA?AFE G :.IJC 1B5KH # 05.0Kgm−3[7],/62 DEIBC,.,-F )4.6Kgm−3,2IGFe–25Mn–6Si–7Cr%/1,JLA?* $(7* % ’%+ $(. M=0.1mg BS210SBD;NH /8 E ,H 0 I//875+=JC. S–2700?OBPKG@D 0)8Q EK,R;L0 1 . ME2 0)SB08Q%8K7,& : @D,1 HRD–150FT3G=,6WS–2000HKFF+.NOI/-6 SG$$7UJ*+75?@ 68HFA.2IJ KL2.1MNOP#100Cr13Ni5Mo%Fe–25Mn–6Si–7Cr,0.-%/1+=45m·s−1634m·s−1? ,&5)7 *+-6@V,75/12h.LK16K2C,E ,6@HML$P3,%QR3 .P QR(S[8−11].Fe–25Mn–6Si–7Cr%/6#100Cr13Ni5Mo E ,W6 % ’%+ E ,W=082. % ’%+ E ,W.M 0 E ,W;#100Cr13Ni5Mo E ,W6 % ’%+ E ,W,Fe–25Mn–6Si–7Cr%/ - ,N +=)45m·s−1@S)MT.#100Cr13Ni5Mo E ,W6 % ’%+ E ,W12U+=?-;V1 T NU∗VX OYTable1Chemicalcomposition∗andmechanicalpropertiesoftestingalloysMechanicalpropertiesTestingalloysChemicalcomposition(massfraction,%)TensilestrengthYieldstrengthElongationHVCSiMnCrNiCuMoFe/MPa/MPa/%0Cr13Ni5Mo(No.1)0.0450.310.5812.65.6–0.72Bal.1182.4980.710.6450Fe–25Mn–6Si–7Cr(No.2)0.0526.1025.47.4–1.1Bal.827.1336.835.4215Note:S≤0.018%,P≤0.024%V2 WOAZBW[CXOAZB\XYPQZ]BD^WERPBF_XTable2Abrasionrateandcavitaion–abrasionrateoftestingalloysaswellasrelativeabrasionresistanceandcavitaion–abrasionresistanceTestingvelocity34m·s−145m·s−1Testingalloy0Cr13Ni5MoFe–25Mn–6Si–7Cr0Cr13Ni5MoFe–25Mn–6Si–7CrAbrasionrate/mgh−120.02717.84754.25430.884Relativeabrasionresistance1.001.121.001.76Cavitation–abrasionrate/mgh−161.93432.222140.63842.304Relativecavitation–abrasionresistance1.001.921.003.325 S[TQ:Fe–25Mn–6Si–7CrU\YVX WZG[R‘]RBFWX5335 S[TQ:Fe–25Mn–6Si–7CrU\YVX WZG[R‘]RBFWX5335 S[TQ:Fe–25Mn–6Si–7CrU\YVX WZG[R‘]RBFWX533^1 OAZBZ]BDHI\RSTFig.1Variationofabrasionmasslosswithtimeforthetestedalloys^2 W[CXOAZB\XYPQZ]BDHI\RSTFig.2Variationofcavitation–abrasionmasslosswithtimeforthetestedalloysC@ @34.227mgh−1678.704mgh−1;Fe–25Mn–6Si–7Cr%/ E ,W4@.;13.037mgh−1610.082mgh−1.MJ+=/Fe–Mn–Si–Cr%/ 0) YZ,0Cr13Ni5Mo#10 !- ,1 +45m/sK5%a] *+.L E ,W8H./ *+,T’.7+=?#100Cr13Ni5Mo *+6 % ’%+ *+)1.00,_Fe–25Mn–6Si–7Cr%/1+=45m/s634m/s *+@0Cr