Issue 62
A. Mondal et alii, Frattura ed Integrità Strutturale, 62 (2022) 624-633; DOI: 10.3221/IGF-ESIS.62.43
0 100 200 300 400 500 600 700 800 900
650 ℃ 700 ℃
700
600
500
550 ℃
400
300
200
550 ℃
100
B23 Hardness (HV10)
0
B37 Hardness (HV10)
0
5 10 15 20 25 30
10
15
20
0
5
(b)
(a)
Time (Hours)
Time (Hours)
700
100 150 200 250 300 350 400
600
550 ℃
500
700 ℃
600 ℃
400
550 ℃
550 ℃
300
200
100
0 50
B22 Hardness (HV 10)
0
B41 Hardness (HV 10)
0
5 10 15 20 25 30
0
5 10 15 20 25 30
(c)
(d)
Time (Hours)
Time (Hours)
Figure 2: Aging curves of (a) B23, (b) B37, (c) B22 and (d) B41 at different temperatures. The red lines show the behaviour of specimens solubilized at 1050 °C for 0.5 h, while the blue lines show the behaviour of specimens solubilized at 1030 °C for 1 hour.
0 100 200 300 400 500 600 700 800
0 100 200 300 400 500 600 700 800 900
σ [MPa]
σ [Mpa]
0,2
0,3
0
0,1
0,4
0
0,1
0,2
0,3
(a)
(b)
Є
Є
0 10 20 30 40 50 60 70 80 90 100
0 100 200 300 400 500 600 700 800 900
σ [ MPa]
σ [MPa]
0
0,002
0,004
0,006
0
0,1
0,2
0,3
0,4
(c)
(d)
Є
Є
Figure 3: Stress-strain curves of (a) B23 and (b) B37 in the as-received conditions. Stress-strain curves of (c) B23 and (d) B37 after heat treatment at 550 °C for 8 hours.
628
Made with FlippingBook PDF to HTML5