2011 Fiscal Year Final Research Report

Highly reliable heat resistant materials based on clarification of dynamic precipitation mechanism of harmful phase

Research Project

Project/Area Number	22760547
Research Category	Grant-in-Aid for Young Scientists (B)
Allocation Type	Single-year Grants
Research Field	Structural/Functional materials
Research Institution	National Institute for Materials Science
Principal Investigator	SAWADA Kota 独立行政法人物質・材料研究機構, 材料信頼性評価ユニット, 主任研究員 (00354225)
Project Period (FY)	2010 – 2011
Keywords	火力発電プラント / 配管 / クリープ強度 / 材質劣化 / 有害析出相
Research Abstract	It is necessary for pipes of thermal power plants to resist steam with high temperature and pressure for several tens of years. However, harmful precipitates form after operating of power plants for several years, leading to degradation of materials. Changes of number density and size of harmful precipitates during using of pipes were investigated. It was clear that the formation of harmful precipitates was pronounced after about six years. Applied stress due to the steam with high temperature and pressure promoted the formation of harmful precipitates.

(3 results)