MECHANICAL METALLURGY |
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Page 265
... martensitic structure may , in many cases , be commercially 70 Rockwell C hardness 60 50 40 30 E A 99.9 % martensite B - 95 % martensite C - 90 % martensite D - 80 % martensite E - 50 % martensite 20 0.1 0.2 0.3 0.4 0.5 0.6 0.7 Carbon ...
... martensitic structure may , in many cases , be commercially 70 Rockwell C hardness 60 50 40 30 E A 99.9 % martensite B - 95 % martensite C - 90 % martensite D - 80 % martensite E - 50 % martensite 20 0.1 0.2 0.3 0.4 0.5 0.6 0.7 Carbon ...
Page 414
... martensite is forming on the surface , and the core readily accommodates to the expansion of the outer layers . The middle and Temperature Austenite Pearlite 0 Ms 22 m Martensite log time ( a ) Austenite C m Martensite log time ( c ) + ...
... martensite is forming on the surface , and the core readily accommodates to the expansion of the outer layers . The middle and Temperature Austenite Pearlite 0 Ms 22 m Martensite log time ( a ) Austenite C m Martensite log time ( c ) + ...
Page 415
... martensite . The reasons for tempering hardened steel are to relieve the high micro- stresses in the martensite and to reduce the level of macro residual stress . Although tempering generally lowers the level of residual stress , there ...
... martensite . The reasons for tempering hardened steel are to relieve the high micro- stresses in the martensite and to reduce the level of macro residual stress . Although tempering generally lowers the level of residual stress , there ...
Contents
Introduction | 5 |
The Torsion Test | 10 |
Stress and Strain Relationships for Elastic Behavior | 17 |
Copyright | |
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alloys aluminum annealing ASTM axis behavior brittle fracture Burgers vector cent compressive considered constant crack decrease determined diameter dislocation line ductile edge dislocation effect elastic elongation equation factor fatigue limit fatigue properties flow curve fracture stress given grain boundaries hardness increase indentation internal friction lattice load martensite material maximum measure Metals Park modulus notch number of cycles occurs orientation particles pile-up plastic deformation principal stresses Proc produced quenched ratio recrystallization reduction of area region residual stresses resolved shear stress screw dislocations shear stress shown shows single crystals slip direction slip lines slip plane slip system Society for Metals solid solution solute atoms specimen stacking fault steel strain energy strain hardening strain rate stress concentration stress-strain curve structure surface tensile strength tensile stress tension theory tion torsion Trans twins vacancies yield point yield strength yield stress