Issue 14

M. Me een consider efer it to th er (A, B, C), pouring tem m the longe s has been s owing the de ethod.

rlin, Frattura ed ed: no crack e specific cas which refers perature (1 st to the shor ummarised in tection of th

Integrità Struttu , light crack, ting a specia to the alloy, = 700°C and test (1, 2, 3, Tab. 2; the e discontinui

rale, 14 (2010) crack, severe l nomenclatu and three nu 2 = 760°C) 4). All the in completely c ty relating to

64-74; DOI: 10 crack and co re has been mbers: the fi and the third formation ob racked bars a a hot spot, p

.3221/IGF-ESIS.

14.07

Fiv ord cla cas num ma gre non

e categories er to identif ssification of ting (1, 2, 3), ber of the b croscopical o en. In Fig. 3, -destructive

of hot tear se y each single the bars con the second ar in ascend bservations there is a ph liquid penetr

verity have b bar and to r sists of a lett specifying the ing order fro of the casting oto clearly sh ant testing m

mplete crack considered. rst indicating referring to tained from re underline erformed by

. In The the the the d in the

bar n°1 (lon

gest)

bar n°2

bar n°3

bar n

°4 (shortest)

A.1.1 A.1.2 A.2.1 A.2.2 A.3.1 A.3.2 B.1.1 B.1.2 B.2.1 B.2.2 B.3.1 B.3.2 C.1.1 C.1.2 C.2.1 C.2.2 C.3.1 C.3.2

x x ------

liquid penetra crack (/\/\/ x x \/\/\/\ /\/\ \/\/\/\/\ \/\/\/\ \/\/\/\/\ /\/\ x x \/\/\/\/\ x x x x x x \/\/\/\/\

x x x x x

/\/\ /\

/\/\/\/\ /\/\/\ x /\/\/\ x

/\/

Alloy A

lts obtained fr \), crack (/\/\ /\/\/\/\/ /\/\/\/\/ /\/\/\/\/ /\/\/\/\/ x x x x x x x x x /\/\/\/\/ x

/\

/\/\/\/\/ /\/\/\/\/ /\/\/\/\/ x /\/\/\/\/ /\/\/\/\/ /\/\/\/\/ /\/\ /\/\/\/

\/\ \/\ \/\

/\/\ /\/\ /\/\/\

/\

/\/\ /\/\ /\/\ /\/\ ------ ------ ------ ------ ------ ------

Alloy B

/\/

\/\ \/\ \/\

\/\

/

\

\/\

/\/

------ /\/\ /\/\/\/ /\/\

Alloy C

\/\

/

\/\

/\/

\

\/\

Table 2 : Resu ht crack (/\/ actography rations have on or to the

om visual and /\/\), severe

nt inspections \/\/\/\) and

[no c

rack (------), lig

k (x)].

complete crac

Mi Th pos

crostructural a e non-destru sible to the h

nalysis and fr ctive conside ot tear locati

e as ions

been usefu initiation of h

l in the selec ot tears. Sam

tion of the ples, taken a

representativ long the axia

e samples dr l and the rad

awn as clos ial cross sect

67