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Dołączył: 22 Lip 2010
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Mg-Y-Nd-Gd-Zr alloys Experimental study of dynamic recrystallization
Qingbia., SunJianfeng2 (. St. E research Laboratm, such as rFabricationandProcessing on the Non-FerrousMetals, GeneralResearchInstitutefoTNon-FerrousMetals, Beijing100088,[link widoczny dla zalogowanych], China; 2.The518thInstituteNo.5AcademyQ plant ChinaAerospaceScience & TechnologyCorporation, Taiyuan030800,[link widoczny dla zalogowanych], China) Abstract: HotcompressiontestsofMg.. Gd. . Y.. Nd.. ZrRE'containingmagnesiumalloywereperformedusingGleeblel500testequipmentatthestrainratewithintherangeof0 .002-1s ~ andthedeformationtem-peratureof523 ~ 723Kunderthedeformationdegreeof50%. Thestain. hardeningratecouldbeobtainedfromtruestress-truestraincurves, theplotsofO-a,[link widoczny dla zalogowanych], A (3O / O). and-lnO. Stare underthedifferentcom. pressionconditionswereobtainedthroughtheagencyofthisstudy. Theresuhsshowedthatthecriticalcon- ditionoftheonsetofDRXprocesswas ((810) (a 30/aa)) = 0, theratiosofthecriticalstressto Hill epeakstressandthecriticalstraintothepeakstrainKeywords: RE-containingmagnesiumalloy; hot-compression; averagegainsizestandswerevariableinthedefiniterange,[link widoczny dla zalogowanych], theonset0fDRXprocessoccurredbeforethepeakofthestress-strainflowcurves. Thetextureevolutionofmagnesiumalloyatthedifferenttemperaturesandstrainrateswerestudiedbythemetallographicobservation, thereerys-tallizationaveragegainsizewasmeasuredusingthein. terceptmethod. Theresultsshowedthattherecrysta1.. 1izationaveragegrainsizeWasenlargingwiththetem. peratureincreasingandthestrainratesdecreasingandtheiroppositeresuhspresented; thepeakstressen- largedfollowingthedecreaseoftherecrystallizationaveragegainsizeandtheoppositeonealsodid. dynamicrecrystallization; stain-hardeningrate; recrystallization
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