recrystallization in metals - Course Notes - McMaster University

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Pulse lasers “ULTRA FAST” HEAT TREATMENT: PULSE LASER IRRADIATION (nano/pico/femtosecond) λ = 800 nm The beam has a Gaussian profile with a radius ω 0 E 0 : full energy pulse (~10 µJ) τ p : duration of the pulse (~ 10 nsec/ 100psec/ 150 fsec) φ: fluence or energy per unit area (J/cm 2 ) φ th : threshold fluence (J/cm 2 ) fluence required to transform the surface 28
Pulse lasers WHY PULSED LASERS 29
Page 1 and 2: RECRYSTALLIZATION IN METALS FLORENT
Page 3 and 4: Recrystallization What is it Fe E =
Page 5 and 6: Recrystallization Improving the mec
Page 7 and 8: Recrystallization Johnson, Mehl, Av
Page 9 and 10: Recrystallization “NUCLEATION”
Page 11 and 12: Rapid heat treatments What are rapi
Page 13 and 14: Salt bath “NUCLEATION” IN IRON
Page 15 and 16: Salt bath “NUCLEATION” IN COPPE
Page 17 and 18: Salt bath “NUCLEATION” IN STAIN
Page 23 and 24: Spot welding machine “RAPID” HE
Page 25 and 26: Spot welding machine RECRYSTALLIZAT
Page 27: Pulse lasers “ULTRA FAST” HEAT
Page 31 and 32: Pulse lasers TEMPERATURE MEASUREMEN
Page 33 and 34: Pulse lasers INSTRUMENTED INDENTATI
Page 35: CONCLUSIONS - FUTURE WORK Investig

recrystallization in metals - Course Notes - McMaster University

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