nondestructive measurement of degradation in aged plants and remaining life evaluation system

老化植物退化无损测量及剩余寿命评估系统

• 批准号: 07555616
• 负责人: SHOJI Tetsuo
• 金额: $ 4.67万
• 依托单位: TOHOKU UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (A)
• 财政年份: 1995
• 资助国家: 日本
• 起止时间: 1995 至 1997
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-07555616/
• 关键词: nondestructive inspection; remaining life evaluation; materials degradation; defect; fatigue; creep damage; embrittlement; genetic algorithm; 遺伝的アルゴリズム; 非破壊検査; 寿命予測; 損傷; 超音波探傷; 交流電位差法; 電気化学; 経年劣化

Degradation mechanisms which can take place in aged energy plant components are widely varied depending on material of the component, service environment, and operating conditions. For plant life management and extension, prediction of remaining lives of the plants which is based on detection and quantitative evaluation of in-service degradation of the components.(1) development of nondestructive inspection methods for various types of degradation which are respectively based on the degradation mechanisms, and (2) development of a prototype system which can specify the dominant deterioration factors for a aged plant components under given operation conditions, have been in the scope of this research project.For defect-type degradation, Induced Current Focused Potential Drop method has been successfully applied to determine shape and size of three dimensionally shaped surface cracks. For material-type degradation, Electrochemical Materials Characterization methods have been developed for the following degradations which no nondestructive inspection methods have been available for ; creep damage in directionally solidified Ni-base super alloy for gas turbine applications, creep damage in W-modified heat-resistant ferritic steels, high-temperature low-cycle fatigue damage in Ni-base superalloys, thermally aging embrittlement of duplex stainless cast, and aging embrittlement of type 310S stainless steel.With respect to the life evaluation system, genetic algorithm has been introduced to develop the prototype system which supports identifying dominant factors for in-service degradation and helps to predict remaining lives of components. The system has been successfully applied to corrosion damage evaluation of heat-exchanger tubes of chemical plants.

老化的能源设备组件中可能发生的降解机制因组件材料、使用环境和操作条件而有很大差异。对于工厂寿命管理和延长，基于组件在役退化的检测和定量评估来预测工厂的剩余寿命。（1）开发分别基于退化机制的各种类型退化的无损检测方法，以及（2）开发原型系统，该系统可以指定给定运行条件下老化工厂组件的主要退化因素，具有 对于缺陷型退化，感应电流聚焦电位降法已成功应用于确定三维表面裂纹的形状和尺寸。对于材料类型的降解，电化学材料表征方法已经开发用于以下没有无损检测方法的降解；燃气轮机用定向凝固镍基高温合金的蠕变损伤、钨变质耐热铁素体钢的蠕变损伤、镍基高温合金的高温低周疲劳损伤、双相不锈钢铸件的热时效脆性、310S型不锈钢的时效脆性。 开发原型系统，支持识别使用中退化的主导因素，并帮助预测组件的剩余寿命。该系统已成功应用于化工厂换热管腐蚀损伤评估。

项目成果

T.Shoji, H.Kim, T.Maeda, Y.Sato and Y.Watanabe: ""A NOVEL NONDESTRUCTIVE INSPECTION AND MONITORING TECHNIQUE FOR PLANT LIFE MANAGEMENT-INDUCED CURRENT FOCUSING POTENTIAL DROP TECHNIQUE"" Proc.of International Symposium on Plant Aging and Life Prediction o

T.Shoji、H.Kim、T.Maeda、Y.Sato 和 Y.Watanabe：“一种新颖的植物寿命管理非破坏性检查和监测技术 - 诱导电流聚焦电位下降技术””植物老化国际研讨会论文集

Y. Watanabe, R. G. Ballinger, O. K. Harling,G. E. Kohse: "Effects of Neutron Irradiation on Transpassive Corrosion Behavior of Austenitic Stainless Steels" Corrosion. 51. 651-659 (1995)

Y.渡边，R.G.巴林格，O.K.哈林，G.

T.Shoji: "A NOVEL NONDESTRUCTIVE INSPECTION AND MONITORING TECHNIQUE FOR PLANT LIFE MANAGEMENT-INDUCED CURRENT FOCUSING POTENIAL DROP TECHNIQUE" Proc.of International Symposium on Plan Aging and Life Prediction of Corrodible Structures. 371-377 (1995)

T.Shoji：“一种新颖的用于植物寿命管理的无损检测和监测技术 - 诱导电流聚焦电位下降技术”Proc.of International Symposium on Plan Aging and Life Prediction of Corodible Structures。

M.Nakahara, T.Shoji: ""Nondestructive Evaluation of Hydrogen Absorption Embrittlement of Tantalum and Life Management in Chemical Plant"" Trans.JSME (A). 62-595. 707-712 (1996)

M.Nakahara、T.Shoji：“钽吸氢脆化的无损评价及化工厂寿命管理” Trans.JSME (A)。

中原 正大: "化学装置に用いられたタンタル性部材の水素ぜい化の非破壊的評価と寿命管理" 日本機械学会論文集(A)編. 62-595. 119-124 (1996)

Masahiro Nakahara：“化学设备中使用的钽零件的氢脆化和寿命管理的无损评估”日本机械工程师学会会刊（A），编辑 119-124（1996 年）。