基于各向異性熱彈性理論的變溫馬氏體相變的細(xì)觀數(shù)值模擬.pdf

1、內(nèi)蒙古工業(yè)大學(xué)碩士學(xué)位論文基于各向異性熱彈性理論的變溫馬氏體相變的細(xì)觀數(shù)值模擬姓名：王晉申請(qǐng)學(xué)位級(jí)別：碩士專業(yè)：固體力學(xué)指導(dǎo)教師：韋廣梅20060501AbstractAbstractMartensitictransfmationexistsinvariousmaterials.Itiswidelyusedinmanyfieldssuchassteelstrengtheningmaterialtougheningshapememyeff

2、ect.Themepeoplepursuingbettermaterialpropertythedeeperresearchfthemartensitictransfmationbecomesnumericalsimulationisoneoftheimptantmethodsoftheresearch.Thetemperaturechangedmartensitictransfmationisoccurredduringquenchi

3、ngtreatment.Itisadynamicprocessofthehighlycouplingcalculationoftemperaturefieldstressfieldmicrostructuredistributioncalculations.Inthispaperthemechanicalpropertiesofmaterialisassumedtobethepracticalanisotropymicrostructu

4、re(romdistributionsofgrains)the01phasetransfmedmodelofstressaffectingtransfmationisputfward.Consideringthetransfmationlatentheatweestablishthecouplingcalculationoftemperaturefieldstressfieldmicrostructuredistributioncalc

5、ulationsthemicrostructuresimulationprocessisconductedfthetemperaturechangedmartensitictransfmationbytakingquenchingtreatmentofa45#thin，long，steelbarfexample.Thecalculationresultsshowthatthewholemodeltemperatureofconsider

6、ingthetransfmationlatentheatishigherthanwithoutregardtoitwiththetimeincreasedthedifferencebetweenthembecomeslargerinthefirstplace.Secondlytheromdistributionsofcrystalgrainsplayanimptantroleinthermalstresssoitissignifican

7、ttotakeitintoaccountduringtransfmationprocess.Thirdlywiththetimegoingonthetemperaturechangedmartensitictransfmationsimulatedinconsiderationoftheanisotropyofthemicrostructurepushonbasicallyfromouterlayerstointerionesbutth

8、etransfmationprocessofgrainscanbedifferentthoughthetemperaturefieldissamefurthermeresidualausteniteisdistributedromly.Keywds:Keywds:Microscopicanisotropy；Temperaturechangedmartensitictransfmation；Finiteelementmethod；Nume