Microtwinning as a common mechanism for the martensitic and pearlitic transformations

Крапошин, В. С.; Jakovleva, I.; Карькина, Л. Е.; Nuzhny, G.; Zubkova, T. A.; Талис, А. Л.

doi:10.1016/j.jallcom.2011.10.102

Cited by 25 publications

(6 citation statements)

References 11 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The nucleus formation is strictly determined by the operations of a non-crystallographic symmetry. Experimentally observed crystal-geometry features of ferrous martensites have been successfully explained [16].…”

Section: Introductionmentioning

confidence: 78%

Transfer of Diagonals in a Rhombus: Elementary Act of Polymorphic Transformation. Analysis of the Energy Threshold of Transformation in Metals

et al. 2020

View full text Add to dashboard Cite

Diagonal flipping of a rhombus consisting of two triangles sharing a common edge with atoms (ions) in vertices of the triangles is considered as an elementary act of the polymorphic transformation in metals. The estimation of the energy threshold for the diagonal flipping has been carried out for various combination of rhombus vertices occupation by Fe, Cr, and Mn atoms. The energy threshold has been calculated in the framework of Morse interatomic pair potential. Numerical coefficients for the approximation of the pair potential function have been scaled by experimental values of the sublimation energy and temperature dependencies of elastic constants for Fe, Cr, Mn. Values of the energy threshold at 1193 K were estimated equal to 195, 150 and 94 kJ/mole for pure Cr, Fe and Mn respectively, i.e. in the same sequence as values of elastic bulk modulus for these metals. The substitution of one Fe atom by Cr or Mn atom results in alteration of the energy threshold. This alteration is dependent on the angle type at this vertex (an acute or obtuse angle), as well as on the ratio of bulk modulus values of iron and alloying element.

show abstract

Section: Introductionmentioning

confidence: 78%

Transfer of Diagonals in a Rhombus: Elementary Act of Polymorphic Transformation. Analysis of the Energy Threshold of Transformation in Metals

et al. 2020

View full text Add to dashboard Cite

show abstract

“…7). This relationship between twin and Fe 3 C carbide structures became a foundation for the model of eutectoid and martensitic transformations in steels by Kraposhin et al (2013). It was shown by Hyde et al (1979) that three-capped trigonal prism Z9 is also the structural unit of twin planes {112} for h.c.p.…”

Section: Figurementioning

confidence: 98%

Finite noncrystallographic groups, 11-vertex equi-edged triangulated clusters and polymorphic transformations in metals

Талис

Крапошин

2014

Acta Cryst Sect A

View full text Add to dashboard Cite

The one-to-one correspondence has been revealed between a set of cosets of the Mathieu group M 11 , a set of blocks of the Steiner system S(4, 5, 11) and 11vertex equi-edged triangulated clusters. The revealed correspondence provides the structure interpretation of the S(4, 5, 11) system: mapping of the biplane 2-(11, 5, 2) onto the Steiner system S(4, 5, 11) determines uniquely the 11-vertex tetrahedral cluster, and the automorphisms of the S(4, 5, 11) system determine uniquely transformations of the said 11-vertex tetrahedral cluster. The said transformations correspond to local reconstructions during polymorphic transformations in metals. The proposed symmetry description of polymorphic transformation in metals is consistent with experimental data.Automorphism of the S(4, 5, 11) Blocks corresponding to 'bottom' tetrahedra of cluster in Fig. 3 No mapping 39 562 34 987 35 40X 4 08 562 60 987 86 40X 4 À1 60 987 86 40X 08 562 2 4 À2 86 40X 08 562 60 987

show abstract

“…(На практике после нагрева при 1100 о С в течение 1 ч в металле могут оставаться отдельные частицы -фазы размером не более 1-4 мкм). Экспериментальные данные этой работы и литературные данные [26][27][28][29] свидетельствуют о быстром протекании этого обратимого превращениях σ . Возможный механизм этого превращения был рассмотрен в работе [30].…”

Section: усталостная прочностьunclassified

Austenitic high-strength nitrogen-containing cast steel: structure, casting, mechanical and operational properties, weldability

Костина¹,

Muradyan²,

Blinov³

et al. 2018

Baikov Institute of Metallurgy and Materials Science of RAS — 80 Years. Collection of Scientific Articles

View full text Add to dashboard Cite

Microtwinning as a common mechanism for the martensitic and pearlitic transformations

Cited by 25 publications

References 11 publications

Transfer of Diagonals in a Rhombus: Elementary Act of Polymorphic Transformation. Analysis of the Energy Threshold of Transformation in Metals

Transfer of Diagonals in a Rhombus: Elementary Act of Polymorphic Transformation. Analysis of the Energy Threshold of Transformation in Metals

Finite noncrystallographic groups, 11-vertex equi-edged triangulated clusters and polymorphic transformations in metals

Austenitic high-strength nitrogen-containing cast steel: structure, casting, mechanical and operational properties, weldability

Contact Info

Product

Resources

About