The time continuity, spatial continuity, and segregation are investigated in the directional solidified columnar dendrite with pulling velocity 40 mu m/s and quenching solidified columnar dendrite of 20SiMn and 20SiMnMo steel. The results show that the growth of columnar dendrite is a dynamic discrete process with interrupted interface growth and periodic trapping of solute enriched boundary layer in growing austenite dendrite matrix. Theoretical analysis shows that the non-equilibrium solute partition at the growing interface and actual temperature gradient accounts for above phenomena. Such growth style results in the segregationless dendrite in the mesoscale. (C) 2013 AIP Publishing LLC.
部门归属
[ma, xiaoping
; li, dianzhong] chinese acad sci, shenyang natl lab mat sci, inst met res, shenyang 110016, peoples r china.
; ma, xp (reprint author), chinese acad sci, shenyang natl lab mat sci, inst met res, shenyang 110016, peoples r china.
; xpma@imr.ac.cn
; dzli@imr.ac.cn
X. P. Ma,D. Z. Li. Interrupted interface growth and periodic boundary layer trapping in dendrite growth of steel[J]. Applied Physics Letters,2013,102(24).
APA
X. P. Ma,&D. Z. Li.(2013).Interrupted interface growth and periodic boundary layer trapping in dendrite growth of steel.Applied Physics Letters,102(24).
MLA
X. P. Ma,et al."Interrupted interface growth and periodic boundary layer trapping in dendrite growth of steel".Applied Physics Letters 102.24(2013).
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