Nauka o materiałach - laboratorium |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Temat: Materiały konstrukcyjne |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Imię i nazwisko: Natalia Orlikowska, Kamil Marcinek, Krystyna Labe |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Grupa: ZIP 22, Sekcja: B |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
MECHANIZMY UMOCNIENIA WYKORZYSTYWANE DO PODWYŻSZENIA WYTRZYMAŁOŚCI STALI |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
DANE: |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
ΔRrs=Σki*xi [MPa] |
|
|
|
|
|
|
1. Przyrost granicy plastyczności spowodowany występowaniem domieszek ΔRrs |
|
|
|
|
|
|
|
|
|
ΔRrs = |
34.4 |
|
ki- współczynnik umocnienia roztworu, domieszkowanego i-tym składnikiem |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
xi- zawartość i-tego składnika (w % masowych) |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
DANE: |
|
|
|
|
|
|
2. Przyrost granicy plastyczności wynikający ze zmiany gęstości dyslokacji ∆Rd |
|
|
|
|
|
|
|
|
|
∆Rd = |
352.910186874791 |
|
∆Rd=α*G*b*ρ^0,5 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
α- stała przyjmująca dla stali wartość ok.. 0,5 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
b- długość wektora Burgersa dyslkokacji, dla ferrytu b= 248nm |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
G- wartość modułu sprężystości poprzecznej osnowy, dla czystego Fe ok.. 90GPa |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
ρ- gęstość dyslokacji |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
DANE: |
|
|
|
|
|
|
3. Przyrost granicy plastyczności spowodowany obecnością dypresyjnych wydzieleń w strukturze stali ∆Rw |
|
|
|
|
|
|
|
|
|
∆Rw = |
386.716645902074 |
|
∆Rw=(0,538*G*b*f^0,5)/d^-0,5*ln(d/2b) [MPa] |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
d- średnica wydzielonych cząsteczek |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
f- udział objętościowy wydzieleń |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
4. Przyrost granicy platyczności spowodowany zmianą wielkości ziarna ∆Rz |
|
|
|
|
|
|
|
|
∆Rz = |
d [μm] |
k=0,5 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
0.1 |
1581.13883008419 |
|
|
|
|
|
|
|
|
|
DANE: |
|
|
|
|
|
|
|
|
1 |
500 |
|
|
|
|
|
|
|
|
|
d- średnica ziarna |
|
|
|
|
|
|
|
|
10 |
158.113883008419 |
|
|
|
|
|
|
|
|
|
ΔRz=ky*d^-1/2 |
|
|
|
|
|
|
|
|
50 |
70.7106781186548 |
|
|
|
|
|
|
|
|
|
k- współczynnik w równaniu Halla Petcha |
|
|
|
|
|
|
|
|
100 |
50 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
R0= |
62.6 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
OSTATECZNE OBLICZENIA: |
|
|
Re= R0+∆Rrs+∆Rd+∆Rw+∆Rz |
|
|
|
|
|
|
WYKRES: |
|
|
|
|
|
|
|
|
|
|
|
|
|
Re = |
886.626832776865 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|