A method for evaluating true interlamellar spacing from micrographs is proposed for a multidomained lamellar structure. The microstructure of these materials is assumed to be composed of many domains with the lamellae aligned roughly parallel to each other within each domain and with the domains themselves randomly oriented relative to one another. An explicit expression for the distribution of...

In this work, the effects of micro-alloying Mn, Ni, and Si on microstructure mechanical properties high-carbon pearlite steels were investigated. The results indicated that addition solely Ni to pearlitic steel can enhance strength through refinement interlamellar spacing, but work-hardening in ferrite colony may be delayed, leading a reduction area. multiple additions increase Mn contents bene...

For the wall-thickness reduction of components destined for pressurized gaseous hydrogen, widespread use high-strength martensitic steels has long been desired. However, their strong susceptibility to hydrogen-assisted fatigue crack growth (HA-FCG) is still limiting proactive applications. Here, we instead focused on pearlite as another potential reinforcing agent development new hydrogen-compa...

An extremely fine, fully pearlitic structure with an interlamellar spacing 30–50 nm has been obtained during continuous cooling transformation at a rate as low as 0.1 C s, of the steel that is normally used to produce nanostructured bainite. The solutes cobalt and aluminium have been added to accelerate the rate of reaction and reduce the interlamellar spacing by increasing the free energy of t...

Several studies available in technical literature highlight that small variations pearlite interlamellar spacing and colony average size promote significant changes the mechanical properties of eutectoid steels. Therefore, quantitative characterization these parameters aiming to establish, or predict, microstructure-property relationships is great importance. However, techniques currently for r...

The wear and rolling contact fatigue (RCF) performance of eutectoid hypereutectoid rail steels were studied. Subsequently, the microstructure evolutions subsurface materials these two after testing comparatively investigated. results indicated that, compared with rail, had lower loss, but longer RCF crack lengths. After rolling-sliding testing, original equiaxed undeformed coarse grains rails i...

Via traditional wire drawing, the medium carbon ferrite-pearlite (MCFP) steel wires can achieve ultrahigh strength beyond 4 GPa normally for high-carbon pearlitic wires, but have a 30–60% lower production cost. The microstructural evolution and mechanical properties of been investigated by means scanning electron microscopy, transmission microscopy tensile testing. increases from 750 MPa up to ...