This paper is a metallurgical study of the microstructure of a
cobalt base hard facing alloy to determine the cause for inconsistant
wear properties. Wear tests on a Stellite 6 alloy, deposited using
oxyacetylene welding techniques, resulted in a wide range of weight
losses.
Microscopic examination has revealed the probable...
Stagnation point heat transfer in a gas undergoing relaxation of its
internal energy is examined by solution of the equations of motion
using the two temperature approach of Wang Chang and Uhlenbeck.
The results are presented in parametric form and show that relaxation effects produce an adiabatic wall temperature above...
The sudden failure of metal structures under load, which has
been a design problem for many years, is characterized by a crack
propagation rate which approaches the speed of sound in the material.
These failures, which are often known as catastrophic fractures,
may be divided into two types which depend...
The mechanical properties of materials at cryogenic temperatures
have been the subject of increasing interest during the past few
years, although very little actual materials testing has been done at
extremely low temperatures because of the high cost and low heat of
vaporaization of liquid helium. Recently, the Department of...
Thermal expansion is one of the most frequently measured
physical properties of materials. One of the important methods
of detecting and measuring these changes is dilatometry, which
is measuring the thermal expansion of the specimen and relating
the specimen's expansion to its temperature.
Four major types of dilatometers are commonly...
A mechanism is a constrained kinematic chain composed of
gears, links, cams, or the like. Mechanisms are the building blocks
of all machines, and, as such, their evaluation is of considerable
importance to the mechanical designer. Because the mathematical
analyses of systems with four or more moving members has been...