Microchemical Evolution in Alloys by Ion Irradiation and Fundamental Research for Creation of New Materials

离子辐照合金中的微化学演化和新材料创造的基础研究

基本信息

批准号：
60420053
负责人：
ISHINO Shiori
金额：
$ 10.5万
依托单位：
The University of Tokyo
依托单位国家：
日本
项目类别：
Grant-in-Aid for General Scientific Research (A)
财政年份：
1985
资助国家：
日本
起止时间：
1985 至 1987
项目状态：
已结题

项目摘要

Microchemical evolution in ion-irradiated alloys is analyzed by energy dispersive X-ray spectroscopy (EDS). Non-equilibrium segregation or depletion of alloying elements is observed in austenitic steels irradiated with heavy ions at elevated temperatures. Ni and Si are enriched around cavities and grain boundaries, while Cr, Mn and Mo are depleted there. These are explained by size factors of these elements. Ni-rich phases which are not seen in thermally controled material affect microstructural evolution during irradiation. MC precipitates in austenitic steels have strong stability during irradiation, while segregation of Ni and Si to their surface can modify the precipitates.Microstructural and microchemical evolution in ion-irradiated alloys strongly depends on both energy and species of injected ions. For example, 400 HeV P^+ ion irradiation to austenitic steels produces iron-phosphide around the depth of ion range, and these precipitates supress void formation under irradiation.Ion irradiation to precipitation-hardened ferritic steel promotes transition of martensitic phase to austenitic phase, which is not observed by thermal aging.Non-equiliburium segregation and precipitation are found in various kinds of alloys during ion irradiation. Enormous data to control the creation of new materials by irradiation with energetic ions have been extracted from the present study.

通过能量色散X射线光谱法（EDS）分析了离子辐射合金中的微化学演化。在高温下用重离子照射的奥氏体钢中观察到非平衡分离或合金元素的耗竭。 Ni和Si围绕腔和晶界富含，而CR，MN和MO在那里耗尽。这些元素的大小因素可以解释这些。在热控制材料中未见的富含Ni的相会影响照射过程中的微结构演化。在辐照过程中，奥氏体钢中的MC沉淀具有很强的稳定性，而将Ni和Si隔离到其表面可以改变沉淀物。在离子IRRADADIDEN的合金中的微结构和微化学演化很大程度上取决于能量和注射离子的物种。例如，对奥氏体钢的400 hev p^+离子辐照在离子深度周围产生磷化铁磷化物，而这些沉淀在辐射下supress supress void形成。离子辐射到降水硬质钢对降水型钢铁钢的过渡促进了降水阶段，从而促进了降水型和降水的降水，从而构建了渐进式的eRemaL eremain.nonon-emagration notal emegrib.nonon-equgrib emeratiur notagration。离子辐照过程中的合金。从本研究中提取了通过用能量离子辐射来控制新材料的巨大数据。