©
COPYRIGHT 2000 THE ESAB GROUP, INC. LESSON
VIII
APPENDIX A LESSON
VIII - GLOSSARY OF TERMS Spalling
- The
loss of particles or pieces from a surface due to cracking.
Galling - The
condition between rubbing surfaces where high spots or protrusions
on a surface become friction welded
to the mating surface, resulting in spalling
and further deterioration. Matrix
- A crystalline
phase of an alloy in which other phases are imbedded.
Shear - A
force which causes deformation or fracture of a member by sliding one
section against another in a plane
or planes which are substantially parallel
to the direction of the force. Hadfield
Steel
- The
name sometimes used for austenitic manganese steel derived from
its inventor.
Coefficient
of
Friction - A
value used in engineering calculations which is an indicator of the
ability of one material to slide on
another. A low coefficient of friction indicates
a low rate of wear between sliding surfaces. Stringer
Bead
- A straight
weld bead opposed to a weaving bead. In surfacing, the
weaving bead produces less dilution
because the weld puddle is always in
contact with the part of the bead produced on the previous oscillation
rather than the base metal.
