The environment assisted cracking of Fe-32Mn-9Al alloys

Book · Sat Dec 31 04:00:00 EST 1994

OSTI ID:70148

Chang, S C; Liu, J Y ^[1]; Juang, H K ^[2]

---

1. National Tsing Hua Univ., Hsinchu (Taiwan, Province of China). Dept. of Materials Science and Engineering
2. Chung Shan Inst. of Science and Technology, Taoyuan (Taiwan, Province of China). Materials Research and Development Center

Stress corrosion cracking (SCC) behaviors of four austenitic Fe-32Mn-9Al containing approximately 1 wt% carbon alloys were studied in this work. All of the four alloys are susceptible to stress corrosion cracking in room temperature and 160C NaCl solution. The SCC can be enhanced by applying anodic potential. The mechanism of SCC is mainly active path corrosion. The crack path is transgranular. The addition of 1.23% Mo or 1.27% Si to the austenitic Fe-32Mn-V/ 9Al alloy does not change the SCC mechanism and crack path. The addition of 1.27% Si makes the alloy more susceptible to SCC but no such effect was observed with 1.23% Mo. All four alloys studied are susceptible to hydrogen embrittlement in 3.5% NaCl solution at negative enough cathodic applied potential. The addition of Mo, Cr or Si in the alloy displaces the embrittlement potential to a more cathodic range.

• OSTI ID: 70148
• Report Number(s): CONF-940222--
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ALUMINIUM ALLOYS
CARBON ADDITIONS
CHEMICAL COMPOSITION
CHROMIUM
CORROSIVE EFFECTS
CRACK PROPAGATION
ELECTROCHEMICAL CORROSION
EXPERIMENTAL DATA
FRACTURE MECHANICS
HYDROGEN EMBRITTLEMENT
IRON BASE ALLOYS
MANGANESE ALLOYS
MECHANICAL PROPERTIES
METALLURGICAL EFFECTS
MOLYBDENUM
MOLYBDENUM ALLOYS
SILICON
SILICON ALLOYS
SODIUM CHLORIDES
STRESS CORROSION