Residual stress evolution enhanced martensite phase transition and texture development in cryogenic-tempered WC-Co ultra-coarse grained cemented carbide

AbstractIn this contribution, the two-scale analysis of residual stress states in a hot bulk formed part with subsequent cooling in the framework of the $$\hbox {FE}^2$$ FE 2 -method is presented. The induction of specific residual stress states in order to improve a component’s properties is an area of current research. In general, residual stresses can be induced inside a component in different ways, e.g., quenching, phase transformation in hot forming processes or dislocation movements. It is widely known that different types of residual stresses can be characterized based on the scale the type acts on. In addition to the macroscopic residual stress analysis, in which residual stresses of first type are considered, this contribution specifically analyzes the microscopic residual stress evolution as a consequence of the cooling of the component.

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Residual Stress Investigations in Austenitic Steel Samples With Different Degree of Low Cycle Fatigue

Textures and Microstructures ◽

10.1155/tsm.33.279 ◽

1999 ◽

Vol 33 (1-4) ◽

pp. 279-289 ◽

Cited By ~ 6

Author(s):

G. D. Bokuchava ◽

V. V. Luzin ◽

J. Schreiber ◽

Yu. V. Taran

Keyword(s):

Residual Stress ◽

Residual Stresses ◽

Austenitic Steel ◽

Cyclic Load ◽

Low Cycle Fatigue ◽

Texture Evolution ◽

Austenitic Stainless Steels ◽

Martensite Phase ◽

Cycle Fatigue ◽

Stress Evolution

Austenitic stainless steels are widely used because of their high corrosion resistance and toughness. The influence of the applied cyclic load on the mechanical properties of the material is of great current interest. In order to investigate residual stress evolution a series of the austenitic steel samples (X6CrNiTi1810) with different degrees of low cycle fatigue was studied. Martensitic phase formation was observed at different degrees of low cycle fatigue. Residual stresses, microstresses in both phases, as well as martensitic precipitation volume fractions, were estimated. Usually after plastic deformation the martensite phase produces a structure of oriented plates or laths. Therefore martensite texture formation during phase transition can be expected. Indeed the registered neutron diffraction spectra from austenitic fatigued samples show texture presence and its variation in dependence of the fatigue degree. The attempt to consider the texture evolution in dependence of fatigue degree and its influence on the residual stresses was made.

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In-Situ Monitoring of the Manufacturing Process and Residual Stress Evolution in Thin-Ply Composites

AIAA Scitech 2021 Forum ◽

10.2514/6.2021-1776 ◽

2021 ◽

Author(s):

Sandeep Chava ◽

Sirish Namilae

Keyword(s):

Residual Stress ◽

Manufacturing Process ◽

In Situ Monitoring ◽

Stress Evolution

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Ab Initio Study of Martensitic Transformation in NiTiPt High Temperature Shape Memory Alloys

Applied Sciences ◽

10.3390/app11156878 ◽

2021 ◽

Vol 11 (15) ◽

pp. 6878

Author(s):

Xiaolan Yang ◽

Jiaxiang Shang

Keyword(s):

Phase Transition ◽

Martensitic Transformation ◽

Electronic Structures ◽

Density Functional ◽

Martensite Phase ◽

Computational Results ◽

Ab Initio Study ◽

Functional Theory ◽

Phase Transition Temperatures ◽

Martensite Structure

The crystal structures and martensitic transformation of Ti50Ni50−xPtx alloys (x = 0, 6.25, 8.33, 10.42, 12.5, 18.75, 25) were studied by means of density functional theory (DFT). The computational results indicate that the lattice parameters of Ti-Ni-Pt alloys continuously increase with increasing the Pt content. It is found that at ≤ 12.5 at.% Pt, the martensite structure is monoclinic B19′ phase, and the energy differences between parent and martensite phases (ΔE) decrease slightly with a minimum observed at 6.25 at.% Pt. However, when the Pt content is increased to around 15 at.%, the most stable martensite phase is the orthorhombic B19 structure, and the ΔE increases sharply with Pt concentration. It was found that the phase transition temperatures are closely related to the energy differences ΔE between parent and martensite phases. The electronic structures of martensite B19 and B19′ phases are also discussed.

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Residual Stress Evolution in Repair Welds

Strain ◽

10.1046/j.1475-1305.2003.00054.x ◽

2003 ◽

Vol 39 (2) ◽

pp. 57-63 ◽

Cited By ~ 5

Author(s):

C. Veiga ◽

A. Loureiro ◽

A. Dias

Keyword(s):

Residual Stress ◽

Stress Evolution

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GPU-Accelerated Molecular Dynamics Simulation to Study Liquid Crystal Phase Transition Using Coarse-Grained Gay-Berne Anisotropic Potential

PLoS ONE ◽

10.1371/journal.pone.0151704 ◽

2016 ◽

Vol 11 (3) ◽

pp. e0151704 ◽

Cited By ~ 5

Author(s):

Wenduo Chen ◽

Youliang Zhu ◽

Fengchao Cui ◽

Lunyang Liu ◽

Zhaoyan Sun ◽

...

Keyword(s):

Phase Transition ◽

Molecular Dynamics ◽

Liquid Crystal ◽

Molecular Dynamics Simulation ◽

Dynamics Simulation ◽

Coarse Grained ◽

Liquid Crystal Phase ◽

Accelerated Molecular Dynamics ◽

Crystal Phase Transition ◽

Liquid Crystal Phase Transition

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Influence of Cup Wheel Grinding and Etching Pretreatment on Residual Stress and Surface Topography for Coated Cemented Carbide Tools

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.497.10 ◽

2012 ◽

Vol 497 ◽

pp. 10-14

Author(s):

Tie Jun Song ◽

Zhi Xiong Zhou ◽

Wei Li ◽

Ai Min Tang

Keyword(s):

Residual Stress ◽

Surface Topography ◽

Cutting Tools ◽

Wheel Speed ◽

Cemented Carbide ◽

Machining Process ◽

Grinding Wheel ◽

Near Surface ◽

Cup Wheel ◽

Coated Cemented Carbide

Cup wheel grinding and etching pretreatment are widely used in complex coated cemented carbide cutting tools machining process. The two processes determine different surface properties due to various mechanical and thermal loads in grinding and complex chemical reaction in etching pretreatment. In this paper, the effect of the grinding wheel speed, the grinding feed rate and the etching time with the Murakami and acid solution on the residual stress and surface topography of coated cemented carbide cutting tools are investigated. After each process, the samples are characterized by scanning electron microscopy and X-ray diffraction. It is found that the grinding wheel speed has a significant influence on residual stress measured in the WC phase. Etching by Murakami generated smooth surface, which partly removed the near-surface residual stress quickly but cannot eliminate.

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