Issue 15

K. Vogel et nt controlled . When the c decreasing a cimen fails. T

alii, Frattura ed . Therefore rack length a gain. When he measured

Integrità Struttu a micro-chev reaches its c the crack len force becom

rale, 15 (2011) ron-tester is ritical value, t gth exceeds es almost ze

21-28; DOI: 10 used to mea he measured the value a 1 ro again.

.3221/IGF-ESIS.

15.03

Th for tow pro

e experiment ces subjected ard the max pagation bec

is carried ou to the applie imum force omes instabl

t displaceme d deflection F MAX before e and the spe

sure the reac force conve the stable c

tion rges rack

for the measu

F

igure 4 : Exper

imental setup

rement of the

maximum forc

e.

no further ween 40 °C

Th trea 150

e first series tment. In th °C, Fig. 5.

of experim at case, no p

ents focus o lasma activat

n the heat ion has been

treatment of carried out.

the specime Their anneal

ns. All spec ing temperat

imens have ures vary bet

pre

and

1.8

40°C 100°C 150°C

1.5

1.2

0.9

0.6

measured force [N]

0.3

0.0

0.00

0.01 0.02 ap

0.03 plied displace

0.04 0.05 ment [mm]

0.06 0

.07

Figure 5 :

Force displace

ment curves fo

r different he

at treatments

(annealing tem

peratures).

An fur the

increase of ther pre-treat one for anne

the annealing ment and an aling temper

temperature annealing te atures of onl

leads to an mperature o y 40 °C.

increase of f 150 °C, the

the measured measured m

maximum f aximum for

orce. For sp ce is about 3

ecimens with 5 % higher t

no han

25