The grain size distribution and the detection of abnormal grain growth of austenite in an eutectoid steel containing niobium

Journal Article · Wed Feb 15 00:00:00 EST 1995 · Scripta Metallurgica et Materialia; (United States)

DOI:https://doi.org/10.1016/0956-716X(95)90844-A· OSTI ID:6591390

Bruno, J C ^[1]; Rios, P R ^[2]

---

1. Instituto Militar de Engenharia, Rio de Janeiro (Brazil). Dept. de Engenharia Mecanica e de Materiais
2. Pontificia Univ. Catolica do Rio de Janeiro (Brazil). Dept. de Ciencia dos Materiais e Metalurgia

The abnormal grain growth of austenite was studied in a commercial steel of composition (wt%): 0.70 C, 1.36 Mn, 0.72 Si, 0.015 P, 0.027 S and 0.03 Nb. Specimens were thermocycled at various conditions and then grain size distribution determined. The grain size distribution shape did not change during normal grain growth but this distribution widened and flattened during the abnormal grain growth. The initial smaller mean size of carbonitrides and/or the highest homogeneity of niobium carbonitride size distribution of the samples submitted to thermal cycles, in comparison with the normalized samples, increased the abnormal grain growth temperature from 1,373 K to 1,473 K.

• OSTI ID: 6591390
• Journal Information: Scripta Metallurgica et Materialia; (United States), Vol. 32:4; ISSN 0956-716X
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
AUSTENITIC STEELS
GRAIN GROWTH
MANGANESE STEELS
CARBON ADDITIONS
NIOBIUM ADDITIONS
PHOSPHORUS ADDITIONS
SAMPLE PREPARATION
SILICON ADDITIONS
SULFUR ADDITIONS
TEMPERATURE RANGE 1000-4000 K
THERMAL CYCLING
ALLOYS
IRON ALLOYS
IRON BASE ALLOYS
MANGANESE ALLOYS
NIOBIUM ALLOYS
SILICON ALLOYS
STEELS
TEMPERATURE RANGE
360102* - Metals & Alloys- Structure & Phase Studies