JPS57113360A - Non-destructive inspection of high-temperature member - Google Patents
Non-destructive inspection of high-temperature memberInfo
- Publication number
- JPS57113360A JPS57113360A JP36581A JP36581A JPS57113360A JP S57113360 A JPS57113360 A JP S57113360A JP 36581 A JP36581 A JP 36581A JP 36581 A JP36581 A JP 36581A JP S57113360 A JPS57113360 A JP S57113360A
- Authority
- JP
- Japan
- Prior art keywords
- actual equipment
- time
- temperature
- deltae2
- deltae1
- 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.)
- Pending
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 Or Analyzing Materials By The Use Of Electric Means (AREA)
Abstract
PURPOSE:To measure degree of deterioration of a high-temperature member in passing of time and a non-destructive manner, by measuring the difference in an electrical resistance between a member of an actual equipment and a material to be heated, which is to undergo the same thermal hysteresis as the actual equipment member and not to undergo the stress. CONSTITUTION:A constant current I is made to pass through a power supply terminal 6 to an actual equipment member 1 and also to a heated material 2 which is held at the same temperature and for the same period of time as the actual equipment member, and potential difference E1 and E2 are measured by a potentiometer 4 at measuring terminals 5. Differences from the pre-operation initial values E01 and E02, that is, E1-E01=DELTAE1 and E2-E02=DELTAE2, are sought, and when a variable from the initial values becomes as DELTAE1/E01-DELTAE2/E02<0, it is to be determined to have entered the acceleration creep region. As it is possible, in this manner, to measure the creep life of a metallic material, which is to be used under a high temperature and a high stress, in a non-destructive manner, occurrence of breakage can be prevented and the time for replacement of parts can be foreseen, and therefore, the period of operation shutdown can be shortened.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP36581A JPS57113360A (en) | 1981-01-07 | 1981-01-07 | Non-destructive inspection of high-temperature member |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP36581A JPS57113360A (en) | 1981-01-07 | 1981-01-07 | Non-destructive inspection of high-temperature member |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS57113360A true JPS57113360A (en) | 1982-07-14 |
Family
ID=11471761
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP36581A Pending JPS57113360A (en) | 1981-01-07 | 1981-01-07 | Non-destructive inspection of high-temperature member |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS57113360A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5860248A (en) * | 1981-10-07 | 1983-04-09 | Hitachi Ltd | Life forecast for high temperature apparatus |
| JPS63117102A (en) * | 1986-11-05 | 1988-05-21 | Hitachi Ltd | Lifetime diagnostic method for central hole of steam turbine rotor |
| US5581039A (en) * | 1992-09-18 | 1996-12-03 | Hitachi, Ltd. | Ceramic body and method and apparatus for detecting change thereof |
-
1981
- 1981-01-07 JP JP36581A patent/JPS57113360A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5860248A (en) * | 1981-10-07 | 1983-04-09 | Hitachi Ltd | Life forecast for high temperature apparatus |
| JPH0210900B2 (en) * | 1981-10-07 | 1990-03-12 | Hitachi Ltd | |
| JPS63117102A (en) * | 1986-11-05 | 1988-05-21 | Hitachi Ltd | Lifetime diagnostic method for central hole of steam turbine rotor |
| US5581039A (en) * | 1992-09-18 | 1996-12-03 | Hitachi, Ltd. | Ceramic body and method and apparatus for detecting change thereof |
| CN1053739C (en) * | 1992-09-18 | 2000-06-21 | 株式会社日立制作所 | Ceramic body and method and apparatus for detecting change thereof |
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