Quantcast Section   II.   WORDS   AND   TERMS

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TM  9-2520-272-34&P   Section   II.   WORDS   AND   TERMS A AXIAL   -   Situated   around,   in   the   direction   of,   on,   or   along   an   axis. BURR   -   Local   rise   of   material   forming   a   protruding   sharp   point   or   high   spot. C CORROSION   -   Chemical   reaction   between   surfaces   of   material   and   environment   to   which   it   is subjected.   Generally   appears   as   rust   on   steel,   or   as   a   light-colored   powdery   coating   on aluminum   or   magnesium. Advanced   forms   of   corrosion   will   result   in   pitting. CRACKS   (BREAKS)   -   Surface   or   material   breakage   caused   by   stress   which   results   in   partial   or complete   separation   of   material. D DISTORTION   -   Loss   of   original   shape,   either   local   or   over   an   area.   Includes   bends,   twisting, warping,   dents,   flattening,   crushing,   or   kinking. E ELONGATION   -   Stretching   or   lengthening   of   original   dimensions,   usually   applies   to   bolt   holes. G GOUGES   -   Grooves   in   or   breakdown   of   metal   surface   from   foreign   contact   under   heavy pressure.   Usually   loss   of   material,   rather   than   displacement. L LEAKAGE   -   Any   evidence   of   a   fluid   beyond   its   container. N NEWTON   -   Metric   term   for   force. NEWTON   METER   -   Metric   term   for   torque. NICKS   -   Small   grooves   or   notches. Usually   displacement   of   material,   rather   than   loss. O OVERHEATING   -   A   condition   indicated   by   discoloration   of   parts   which   usually   results   in   a   loss of   hardness.   Usually   caused   by   a   lack   of   lubrication,   malfunction   of   parts,   or   excessive   wear. Glossary  5 B


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