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JPS5729947A - Presuming method for expiration data of metallic material - Google Patents

Presuming method for expiration data of metallic material

Info

Publication number
JPS5729947A
JPS5729947A JP10362080A JP10362080A JPS5729947A JP S5729947 A JPS5729947 A JP S5729947A JP 10362080 A JP10362080 A JP 10362080A JP 10362080 A JP10362080 A JP 10362080A JP S5729947 A JPS5729947 A JP S5729947A
Authority
JP
Japan
Prior art keywords
metallic material
parameter
expiration data
damage rate
rrho
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP10362080A
Other languages
Japanese (ja)
Other versions
JPH0113060B2 (en
Inventor
Masao Shiga
Seishin Kirihara
Takehiko Yoshida
Mitsuo Kuriyama
Takatoshi Yoshioka
Shintaro Takahashi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hitachi Ltd
Original Assignee
Hitachi Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP10362080A priority Critical patent/JPS5729947A/en
Publication of JPS5729947A publication Critical patent/JPS5729947A/en
Publication of JPH0113060B2 publication Critical patent/JPH0113060B2/ja
Granted legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N17/00—Investigating resistance of materials to the weather, to corrosion, or to light

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Biodiversity & Conservation Biology (AREA)
  • Ecology (AREA)
  • Environmental & Geological Engineering (AREA)
  • Environmental Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Investigating And Analyzing Materials By Characteristic Methods (AREA)
  • Heat Treatments In General, Especially Conveying And Cooling (AREA)

Abstract

PURPOSE:To make possible a presumption of the expiration data of metallic material by a nondestructive inspection, by determining a necessary parameter corresponding to prescribed physical quantities of the metallic material being used at a high temperature and performing an operation based on the damage rate corresponding to measured value of hardness and the parameter. CONSTITUTION:A parameter P corresponding to an actually measured resistance ratio Rrho is determined from the curve for the ratio Rrho of respective electric resistances of metallic material being used at a high temperature plus at a low temperature and the parameter P such as a temperature T, working time t. A necessary damage rate phic is obtained from Hv-P curve of each damage rate phic by said parameter P plus measured hardness Hv and a remaining life t2 is computed by performing an operation on the basis of the equation I. Hereby, the expiration data of the metallic material can be presumed by a nondestructive inspection. Here, t1 is presuming working time.
JP10362080A 1980-07-30 1980-07-30 Presuming method for expiration data of metallic material Granted JPS5729947A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10362080A JPS5729947A (en) 1980-07-30 1980-07-30 Presuming method for expiration data of metallic material

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10362080A JPS5729947A (en) 1980-07-30 1980-07-30 Presuming method for expiration data of metallic material

Publications (2)

Publication Number Publication Date
JPS5729947A true JPS5729947A (en) 1982-02-18
JPH0113060B2 JPH0113060B2 (en) 1989-03-03

Family

ID=14358805

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10362080A Granted JPS5729947A (en) 1980-07-30 1980-07-30 Presuming method for expiration data of metallic material

Country Status (1)

Country Link
JP (1) JPS5729947A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02167443A (en) * 1988-12-21 1990-06-27 Hitachi Ltd Life expectancy diagnostic device by nondestructive inspection
US5042295A (en) * 1985-06-21 1991-08-27 General Electric Company Method for determining remaining useful life of turbine components

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5042295A (en) * 1985-06-21 1991-08-27 General Electric Company Method for determining remaining useful life of turbine components
JPH02167443A (en) * 1988-12-21 1990-06-27 Hitachi Ltd Life expectancy diagnostic device by nondestructive inspection

Also Published As

Publication number Publication date
JPH0113060B2 (en) 1989-03-03

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