Title of article :
Strength and toughness tradeoffs for an ultrafine-grain size ferrite/cementite steel produced by warm-rolling and annealing
Author/Authors :
Zhao، نويسنده , , Mingchun and Huang، نويسنده , , Xiaofang and Li، نويسنده , , Jing-Li and Zeng، نويسنده , , Tian-Yi and Zhao، نويسنده , , Ying-Chao and Atrens، نويسنده , , Andrej، نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 2011
Pages :
12
From page :
8157
To page :
8168
Abstract :
For an ultrafine grain ferrite/cementite (UGF/C) steel, the Charpy impact energy was measured at temperatures from 373 K to 4.2 K, and tensile tests were carried out at temperatures between 323 K and 77 K. For the steel with annealed microstructure, the ductile-to-brittle transition appearance temperature (DBTT) was lower than the Charpy transition temperature (CTT). With increasing annealing time at 873 K, the DBTT and the CTT increased, and the DBTT approached the CTT. The DBTT decreased with decreasing effective grain size. The effective grain size correlated to the grain size of the larger grain size peak in the distribution of grains with {1 0 0} planes. The annealed microstructures had higher yield strength for equivalent toughness (including upper shelf energy, DBTT and CTT) compared to the conventional ferrite/pearlite steel.
Keywords :
Impact energy , Toughness , Ductile fracture , Cleavage fracture , Ductile-to-brittle transition , Ultrafine-grained ferrite/cementite microstructure
Journal title :
MATERIALS SCIENCE & ENGINEERING: A
Serial Year :
2011
Journal title :
MATERIALS SCIENCE & ENGINEERING: A
Record number :
2168888
Link To Document :
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