1 results listed
A quantitative grain boundary analysis and impact
properties of thermomechanically rolled X70 pipeline steels were
conducted. Three different X70 samples that were coiled at
different temperatures were characterized by SEM-EBSD
technique. Number of low angle and coincidence site lattice (CSL)
grain boundaries were quantified. Tensile and impact properties
were measured and related by low angle grain boundaries
(LAGB) and CSL boundaries. The results showed that, tensile and
impact properties are varying with these boundary types. While
yield and tensile strength increases by increasing LAGB and Σ3
boundaries, impact properties i.e Charpy and drop weight tear
(DWTT) energies are generally in a decreasing trend. Moreover,
it was observed that grain size due to higher Ti/N rate is a more
effective mechanism for Charpy energy than the grain boundary
type.
International Iron & Steel Symposium
UDCS
Semih Engün
Servet Turan
Orhan Uzun
Oğuz Gündüz