文档名：坡口形状对CLAM钢焊缝抗辐照损伤性能的影响
摘要：为探究坡口形状对中国低活化马氏体(CLAM)钢焊缝辐照损伤性能及辐照硬化性能的影响,采用扫描电子显微镜(SEM)、原子力显微镜(AFM)、透射电子显微镜(TEM)、掠入射X射线衍射(GIXRD)和纳米压痕技术等方法,研究了在室温下经能量为70keV、剂量为1×1017ions/cm2的He+辐照后,V型、U型和双U型坡口CLAM钢焊缝的辐照损伤情况及力学性能.结果表明,离子辐照后,不同坡口形状焊缝金属中均产生了氦泡、析出物等缺陷,力学性能呈现出不同程度的降低.与V型和U型坡口焊缝相比,双U型坡口焊缝辐照后焊缝内部缺陷分布更均匀、尺寸更小.这是由于在三类焊缝中,双U型坡口焊缝热输入更小,焊缝晶粒组织相对较小,晶界密度更高.更高密度的晶界阻碍了缺陷间的相互聚集,减小了缺陷的尺寸.辐照后双U型坡口焊缝表面粗糙度最低,氦泡、析出物尺寸最小,衍射峰偏移量、宽化率最低,表面硬度最低,抗辐照硬化性能最好.这表明通过控制焊接坡口的形状,细化焊缝晶粒组织,可显著提升焊缝抗辐照损伤性能及抗辐照硬化性能.
Abstract：ToinvestigatetheeffectofgrooveshapeontheirradiationdamageandhardeningperformanceofChineselowactivationmartensitic(CLAM)steelwelds,scanningelectronmicroscopy(SEM),atomicforcemicroscopy(AFM),transmissionelectronmicroscopy(TEM),grazingin-cidenceX-raydiffraction(GIXRD),andNano-indentationtechnologywereusedtostudytheirradiationdamageandmechanicalpropertiesofV-shaped,U-shaped,anddoubleU-shapedCLAMsteelweldsafterirradiationwithHe+atanenergyof70keVtoadoseof1×1017ions/cm2atroomtemperature.Theresultsshowedthatafterionirradiation,defectssuchasheliumbubblesandprecipitatesweregeneratedinweldmetalswithdifferentgrooveshapes,andthedegreeofreductioninmechanicalperformancevaries.ComparedwithV-shapedandU-shapedgroovewelds,doubleU-shapedgrooveweldshaveamoreuniformdistributionandsmallersizesofintemaldefectsafterirradiation.Thisisbecauseamongthethreetypesofwelds,thedoubleU-grooveweldhasasmallerheatinput,arelativelysmallergrainstructure,andahighergrainboun-darydensity.Thehigherdensityofgrainboundarieshindersthemutualaggregationofdefects,andreducesthesizeofdefects.Afterirradiation,thesurfaceroughnessofthedoubleU-shapedgrooveweldisthelowest,thesizeofheliumbubblesandprecipitatesisthesmallest,thediffrac-tionpeakoffsetandbroadeningratearethelowest,thesurfacehardnessisthelowest,andtheirradiationhardeningresistanceisthebest.Thisindicatesthatbycontrollingtheshapeoftheweldinggrooveandrefiningthegrainstructureoftheweld,theirradiationdamageresistanceandirra-diationhardeningresistanceoftheweldcanbesignificantlyimproved.
作者：乔永丰 雷玉成 姚奕强 朱强 Author：QIAOYongfeng LEIYucheng YAOYiqiang ZHUQiang
作者单位：江苏大学材料科学与工程学院,江苏镇江212013中广核研究院有限公司,广东深圳518000
刊名：材料导报 ISTICEIPKU
Journal：MaterialsReports
年，卷(期)：2024, 38(10)
分类号：TG442
关键词：CLAM钢 焊接坡口 辐照损伤 辐照硬化 纳米压痕
Keywords：CLAMsteel weldinggroove irradiationdamage irradiationhardening nano-indentation
机标分类号：TG146.4TG407TL341
在线出版日期：2024年6月27日
基金项目：坡口形状对CLAM钢焊缝抗辐照损伤性能的影响[
期刊论文] 材料导报--2024, 38(10)乔永丰 雷玉成 姚奕强 朱强为探究坡口形状对中国低活化马氏体(CLAM)钢焊缝辐照损伤性能及辐照硬化性能的影响,采用扫描电子显微镜(SEM)、原子力显微镜(AFM)、透射电子显微镜(TEM)、掠入射X射线衍射(GIXRD)和纳米压痕技术等方法,研究了在室温下经能量...参考文献和引证文献
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坡口形状对CLAM钢焊缝抗辐照损伤性能的影响 Effect of Groove Shape on Irradiation Damage Resistance of CLAM Steel Welds
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