Study on the relationship between intermediate-temperature embrittlement and triaxial stress induced by the ellipsoidal graphite in hot-rolled ferritic spheroidal graphite cast iron

Y. F. Lin, T. S. Lui, L. H. Chen

研究成果: Article同行評審

4 引文 斯高帕斯(Scopus)

摘要

The intermediate-temperature embrittlement of a hot-rolled ferritic spheroidal graphite cast iron was studied with the consideration that triaxial stress is induced by the ellipsoidal graphite particles of three unequal axial radii. The graphite shape was changed by various rolling reductions, and the tensile tests were performed at 673 K. The results show that the elongation and flow stress are independent of rolling reduction, and intergranular fracture occurs in all specimens. In the plasticity analysis, the triaxiality ratio (σ m σeq) at a point in the ferrite matrix center can be expressed in terms of graphite shape ratio (b d ) and graphite interparticle spacing (2 a d ) as σ meq = 1/3 +a d /(2 b d ) where σ m is the hydrostatic tensile stress and σeq is the equivalent stress. Accordingly, the average triaxiality ratio in the matrix center region is independent of rolling reduction and greater than one, a result that is consistent with the fact that the elongation is about constant, and all specimens undergo intergranular fracture. Moreover, the rolling reduction independent flow-stress behavior can be rationalized by the analytical result that the average σ meq is unchanged with rolling reduction, where σ z is the internal stress along the tensile direction.

原文English
頁(從 - 到)1101-1106
頁數6
期刊Metallurgical and Materials Transactions A
26
發行號5
DOIs
出版狀態Published - 1995 五月 1

All Science Journal Classification (ASJC) codes

  • 凝聚態物理學
  • 材料力學
  • 金屬和合金

指紋

深入研究「Study on the relationship between intermediate-temperature embrittlement and triaxial stress induced by the ellipsoidal graphite in hot-rolled ferritic spheroidal graphite cast iron」主題。共同形成了獨特的指紋。

引用此