gen embrittlement reducing effect. 
This work was carried out at the R&D Center of Indüstria de Fundicao Tupy Ltda, Join- Ee 
ville, SC, Brazil. The authors would like to acknowledge the useful discussion with a 
Prof. Dr. Michael Pohl - University of Bochum, PO 
ABSTRAL 
References = 
( 1) RBhrig, K. Giesserei-Praxis (13/14): 178-181, 1988. SE 
( 2) Goodyer, B. The Foundryman, 81 (10): 465-471, 1988. 
( 3) Guedes, L.C. et all. In: CASTINGS TO SATISFY OUR CUSTOMERS. BCIRA Conf., 1989. KURZEAS 
( 4) Guesser, W.L. et all. In: FRACTURE PREVENTION IN ENERGY AND TRANSPORT SYSTEMS, UBER D 
Rio de Janeiro, nov. 1983. EE 
( 5) Wright, R.N. & Farrell, T.R. AFS Transactions, 93: 853-866, 1985. {gs wurd 
( 6) Thompson, A.W. & Bernstein, I.M. In: HYDROGEN IN METALS, AIME, 1981, p. 2°91. Heer 
( 7) Garber, R. et all. In: HYDROGEN DAMAGE SOURCE BOOK, ASM, 1977, p. 352-356. SL 
( 8) Bernstein, I.M. & Thompson, A.W. In: HYDROGEN EMBRITTLEMENT AND STRESS CORRO- Untersu 
SION CRACKING, ASM, 1984, p. 135-152. Ee 
(9) Chan, S.L.I. & Charles, J.A. Materials Science and Technology, 2: 956, 1986. | oy 
(10) Pussegoda, L.N. & Tyson, W.R. In: HYDROGEN IN METALS, AIME, 1981, p. 349-360. 
(11) Calavre, G. et all. In: FIELD METALLOGRAPHY FAILURE ANALYSIS AND METALLOGRAPHY wo 
CONFERENCE. Boston, 1986, ASM. NE 
(12) Lee, T.S.F. & Latanision, R.M. Metallurgical Transactions, 18-A: 1653-1662, insolub 
sep. 1987. oe 
(13) Snape, E. AFS Cast Metals Research Journal, 6 (1): 32-34, 1970. The t 
(14) Schulte, F. Giesserei, 38 (9): 197-205, 1951. Sly 
(15) Guesser, W.L. & Kllhl, R. Ferros Fundidos Maleavels. Sociedade Educacional Tupy, restric 
1984. “LL 
(16) Pohl, M. & Lange, G.A. Analysis of Technical Failures. Post-graduation Course. high S 
Universidade de Sao Paulo, 1988. vo 
(17) Oriani, R.A. Corrosion - NACE, 43 (7): 390-397, 1987. austen; 
(18) Horstmann, D. Riss-und Brucherscheinungen bei metallischen Werkstoffen. Verlag en 
Stahleisen mbH, Dllsseldorf, 1983. The co 
(19) Pourladian, B. & Voigt, R.C. AFS Transactions, 95: 515-522, 1987. oo 
(20) Eldory, L. & Voigt, R.C. AFS Transactions, 94: 621-630, 1986. N. ste 
(21) Johnson, H.H. In: HYDROGEN EMBRITTLEMENT AND STRESS CORROSION CRACKING, ASM, He 
1984, p. 3-27. Carbon 
Prakt. Met. Sonderbd. 21 (1990) 
1:30