Eutectic cell wall morphology and tensile embrittlement in ferritic spheroidal graphite cast iron

F. T. Shiao, T. S. Lui, L. H. Chen, S. F. Chen

研究成果: Article

11 引文 斯高帕斯(Scopus)

摘要

Four ferritic spheroidal graphite (SG) cast irons (3.4C-3.9Si, 3.5C-2.7Si, 3.5C-2.0Si, and 2.0C-2.1Si, in wt pct) were chosen to study the eutectic cell morphology and the related tensile embrittlement. For the three test materials with high carbon concentration, the results indicate that the average eutectic cell wall size and the amount of cell wall inclusions decrease with decreasing silicon concentration. Compared to the test material with 3.5C-2.0Si, which has many inclusions dispersed in the ferrite matrix, the one with 2.0C-2.1Si shows larger average eutectic cell wall size and larger degree of inclusion clustering in the cell walls. Tensile embrittlement may occur in two temperature ranges, namely, the intermediate low-temperature range at the end of the upper elongation shelf and the intermediate high-temperature range of around 400°C. In both cases, the brittle cracks are initiated preferentially at the inclusion clusters in the eutectic cell wall region. Hence, the two tensile embrittlements occur only for the materials with a larger degree of inclusion clustering in the eutectic cell walls.

原文English
頁(從 - 到)1775-1784
頁數10
期刊Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science
30
發行號7
DOIs
出版狀態Published - 1999 一月 1

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics
  • Mechanics of Materials
  • Metals and Alloys

指紋 深入研究「Eutectic cell wall morphology and tensile embrittlement in ferritic spheroidal graphite cast iron」主題。共同形成了獨特的指紋。

  • 引用此