Issue 14

M. Me

rlin, Frattura ed

Integrità Struttu

rale, 14 (2010)

64-74; DOI: 10

.3221/IGF-ESIS.

14.07

C O

NCLUSION S

B

ased on EN AB - The C

the obtained -21100 and o outure-Edwa thanks to th nt lengths. ractured brid erefore, amo olidification. ith the high has been rev crease in the menon; even sented the lo statistical st e castings rel and the t Obviously, t s are under c on of the allo be soon rela

results, the f its two foun rds test has e presence o ges have be ng the exami est copper ealed by mea contents of though it se west number udy has been ating to the h endency of o confirm the onsideration ys. The calcu ted to the qu

following con dry variants proved to b f hot spots g en found on ned alloys, c content the ns of micros silicon in th ems that silic of cracked b performed ot spots; it h Al-Cu sand se results th to correlate lation of a h antitative mic

clusions can containing a e suitable for enerated by the hot tear haracterised b crack healing tructural anal e alloy did n on did not a ars. by means o as been very mould cast e analysis nee the obtained ot tearing ind rostructural

be drawn as dditions of co the study o a critical sect surfaces, es y the lowest effect due ysis of severa ot significan ffect the dist f image analy useful to un ings to a c ds to be perf information icator, based parameters p

regards the pper and sil f the hot tea ion change b pecially in A amount of e to the distrib l samples dra tly contribut ribution of th sis software derstand pos omplete fail ormed on a g with the stre on the surfa resented in th

hot tearing b icon: ring behavio etween sphe lloy A conta utectic liquid ution and c wn from the e to an incre e eutectic ph on the vari sible correlati ure due to reater numb ss state of th ce fraction o is paper.

ehaviour of a ur of alumin rical feeders ining 4.8wt.% available in oarseness of hot spots. ase of the c ase, the cast ous microgra ons between the hot tea er of samples e material du f hot tears in

lloy ium and in the the rack ings phs the ring . ring the

fo b undry alloys ars of differe everal solid f pper and th st stages of s the alloys w tectic phase moderate in ealing pheno Alloy C pre preliminary rawn from th icrostructure henomenon. urther studie e solidificati ot spots, will

- S

co la - In eu - A h in - A d m p - F th h

A C

KNOWLEDG

EMENT

T

he autho realisatio Dr. Gau

r wishes to t n of the alu denzio Preti

hank Fonder minium casti and Dr. Enri

ia Scacchetti ngs. Many th co Santarato

Leghe Legge anks are also for their exp

re srl of San due to Dr. erimental con

Felice sul Pa Lorenzo Pive tribution to

naro (Moden tti, Dr. Ales this research

a - Italy) for sandro Caval .

the lini,

R E

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