Measurements of the thermal expansion coefficient of 1Cr18Ni9Ti stainless steel with a laser scanning microdisplacement detection technique

Conference · Fri Sep 01 00:00:00 EDT 1989 · International Journal of Thermophysics; (USA)

OSTI ID:6003504

Fan, H T; Shen, C H; Liu, Y; Wang, J ^[1]

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1. Shanghai Jiao Tong Univ. (China)

A laser scanning microdisplacement detection system has been developed to measure the thermal expansion coefficient of materials over the range from room temperature to 1,200 K. The measurement apparatus consists of a dynamic heating device, a microdisplacement detection system, and a microcomputer-based high-speed data acquisition system. The specimen is dynamically heated from room temperature to 1,200 K by passing a large electrical current through it. The thermal expansion of the specimen is detected by the laser detection system, which records the shift of Fraunhofer diffraction fringes with a photodetector. Measurements of the mean linear thermal expansion coefficient of 1Cr18Ni9Ti stainless steel in the range of 300-1,200 K are described. The results are compared with other reported values of the thermal expansion coefficient. The maximum deviation between them is about 2.3% at the highest temperature, 1,200 K.

• OSTI ID: 6003504
• Report Number(s): CONF-880606-; CODEN: IJTHD
• Journal Information: International Journal of Thermophysics; (USA), Vol. 10:5; Conference: 10. symposium on thermophysical properties, Gaithersburg, MD (USA), 20-23 Jun 1988; ISSN 0195-928X
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
47 OTHER INSTRUMENTATION
DIFFRACTOMETERS
ACCURACY
LASER RADIATION
DIFFRACTION
STAINLESS STEELS
THERMAL EXPANSION
STEEL-CR18NI9TI
DATA ACQUISITION SYSTEMS
DIFFRACTION METHODS
FRAUNHOFER LINES
HELIUM-NEON LASERS
HIGH TEMPERATURE
MEASURING METHODS
MEDIUM TEMPERATURE
MICROPROCESSORS
PHOTODETECTORS
TEMPERATURE MEASUREMENT
VERY HIGH TEMPERATURE
ALLOYS
AUSTENITIC STEELS
CHROMIUM ALLOYS
CHROMIUM-NICKEL STEELS
COHERENT SCATTERING
COMPUTERS
CORROSION RESISTANT ALLOYS
ELECTROMAGNETIC RADIATION
ELECTRONIC CIRCUITS
EXPANSION
GAS LASERS
HEAT RESISTANT MATERIALS
HEAT RESISTING ALLOYS
HIGH ALLOY STEELS
IRON ALLOYS
IRON BASE ALLOYS
LASERS
MATERIALS
MEASURING INSTRUMENTS
MICROELECTRONIC CIRCUITS
NICKEL ALLOYS
RADIATIONS
SCATTERING
STEELS
TITA
TITANIUM ADDITIONS
360104* - Metals & Alloys- Physical Properties
440500 - Thermal Instrumentation- (1990-)
440600 - Optical Instrumentation- (1990-)