Materials reliability. Technical activities, 1990. (NAS-NRC Assessment Panel, January 31-February 1, 1991)

Technical Report · Sat Dec 01 00:00:00 EST 1990

OSTI ID:6023568

McHenry, H I

Selected Highlights of the Materials Reliability Division are as follows: Composites NDE: A high resolution ultrasonic system has been developed for inspecting thick polymer-matrix composites; NDE Instruments: Field trials were conducted on two prototype ultrasonic NDE instruments. A formability sensor system was delivered to the Ford Motor Company for evaluation at their Dearborn stamping plant. An ultrasonic system for roll-by inspection of railroad wheels is being evaluated at the American Association of Railroads test track in Pueblo, Colorado; Elastic Waves in Composites: A powerful technique using a time-dependent Green's function method has been developed for studying propagation of elastic waves and their scattering from discontinuities in anisotropic solids; Electronic Packaging: Computer programs have been developed to convert coordinate points on solder joint surfaces obtained by x-ray laminography and optical inspection into finite element meshes for stress analysis; Thermomechanical Processing: The continuous cooling transformation (CCT) characteristics and the high-temperature, high strain-rate flow properties were measured for microalloyed SAE 1141 forging steel; Charpy Standards: Over 1000 industrial customers were supplied with Charpy V-notch reference specimens and calibration services for certification of Charpy impact test machines to ASTM Standard E23; Cryogenic Testing: A 5 MN (1 million pound-force) servohydraulic testing machine was refurbished and equipped with a cryostat and dewar capable of testing specimens 2 m long and 50 cm in diameter in liquid helium; Aluminum-Lithium Alloys: A cooperative program with NASA indicated that aluminum-lithium alloys have sufficient oxygen compatibility for use in cryogenic tankage for the Advanced Launch System; Automated Welding: An intelligent welding program was initiated for the U.S. Navy in conjunction with Babcock and Wilcox and INEL.

• Research Organization: National Inst. of Standards and Technology (MSEL), Gaithersburg, MD (USA)
• OSTI ID: 6023568
• Report Number(s): PB-91-143339/XAB; NISTIR-90/4395
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
42 ENGINEERING
MATERIALS
RELIABILITY
MATERIALS TESTING
AIRCRAFT
ALUMINIUM ALLOYS
ARC WELDING
AUTOMATION
CHARPY TEST
COMPOSITE MATERIALS
COMPUTER CODES
CRYOGENICS
ELASTICITY
GREEN FUNCTION
INSPECTION
LITHIUM ALLOYS
NONDESTRUCTIVE TESTING
PACKAGING
RESEARCH PROGRAMS
SOLDERED JOINTS
STANDARDS
STEELS
STRESS ANALYSIS
SUPERCONDUCTORS
THERMOMECHANICAL TREATMENTS
ULTRASONIC TESTING
US NBS
WHEELS
ACOUSTIC TESTING
ALLOYS
DESTRUCTIVE TESTING
FABRICATION
FUNCTIONS
HEAT TREATMENTS
IMPACT TESTS
IRON ALLOYS
IRON BASE ALLOYS
JOINING
JOINTS
MATERIALS WORKING
MECHANICAL PROPERTIES
MECHANICAL TESTS
NATIONAL ORGANIZATIONS
TENSILE PROPERTIES
TESTING
US DOC
US ORGANIZATIONS
WELDING
360000* - Materials
420500 - Engineering- Materials Testing