Steels_ Metallurgy and Applications, Third Edition

70

60

10

5O

.2 c:^40

~ e- 3o

o

uJ 20

100

O

'~e ""~' ' '

I

o e

& i

c,~l..

%~'=-1

Z~ -~.

~:t:i .*'j-- d, A. 9 .-- .:..'&" , j .a..~.~.~ "&'&-m E C

"""'"" O

9 = 1,.. 9 9 = =

0 10 20 30 40 50 60 70

Gauge length / mm

Figure 1.30 Variations of elongation with gauge length for three ultra-high-strength
steels (After lwaya et al. 51)

8~a9

.~ 80

~ 60

~ 4o

2o

32 Steels: Metallurgy and Applications

0 0.5 1.0 1.5 2.0

Homogeneity Index

Figure 1.31 Relationship between homogeneity index and local elongation for
ultra-high-strength steel (After Yamazaki et al. s2)

5

E

E

~4 .~_

~3

C |

E

.E 1

.m e"

~0

\

o -

30 40 50 60 70 80

Local elongation/%

Figure 1.32 Relationship between local elongation and minimum bending radius for
ultra-high-strength steel (After Yamazaki et al. 52)