Martensite is a very hard form of steel crystalline structure. It is named after German metallurgist Adolf Martens . By analogy the term can also refer to any crystal structure that is formed by diffusionless transformation .

Martensite is a very hard metastable structure with a body-centered tetragonal (BCT) crystal structure. Martensite is formed in steels when the cooling rate from austenite is at such a high rate that carbon atoms do not have time to diffuse out of the crystal structure in large enough quantities to form cementite (Fe3C).

2012年1月1日 · Martensite in ferrous alloys exhibits various morphologies, chiefly lath, lenticular and thin plate, depending on chemical compositions and M s temperature. This chapter reviews crystallographic features and substructures for each of these specific forms.

In this study, gradient α″ martensite were introduced along the radial direction of cylindrical Ti-10V-2Al-3Fe (Ti-1023) samples by torsional straining, which simultaneously improved strength and...

2023年9月7日 · What makes martensite so vital in strengthening steel, and how do its different forms impact its properties? This article explores the diverse morphologies of martensite, including lath, flake, butterfly, and ε’ martensite, and their unique characteristics.

2015年11月30日 · It begins by defining phase transformations and diffusionless transformations. It then focuses on martensitic transformations specifically, describing how austenite transforms to martensite via a diffusionless mechanism involving small atomic displacements.

Martensite can form at very low temperatures, where diffusion, even of interstitial atoms, is not conceivable over the time period of the experiment. Table 1 gives values of the highest temperature at which martensite forms in a variety of materials; this temperature is known as the martensite–start, or MS temperature. It is obvious that ...

Fig. 4 illustrates a typical lath martensite structure with a three-level hierarchy in its morphology [2]: martensite lath, block, and packet. The martensite lath is a single crystal of...

Martensite crystal structure. Cryogenics or deep freezing have been around for quite some time. There is documented research from as far back as the 1930's where German companies used it on...

The Morphology of Martensite in Iron Alloys G. KRAUSS AND A. R. MARDER Light and electron microscopy have been used to determine the main structural differences between the two major types of martensite in ferrous alloys. In the martensite that formsin dilutealloysof iron, the basic transformation unit takesthe shape of a lath, andhencethe