A Multiphysics Model for Predicting Microstructure Changes and Microhardness of Machined AerMet100 Steel

The machined-surface integrity plays a critical role in corrosion resistance and fatigue properties of ultra-high-strength steels. This work develops a multiphysics model for predicting the microstructure changes and microhardness of machined AerMet100 steel. The variations of stress, strain and tem...

Full description

Saved in:
Bibliographic Details
Published inMaterials Vol. 15; no. 13; p. 4395
Main Authors Zhang, Wenqian, Chen, Xupeng, Yang, Chongwen, Wang, Xuelin, Zhang, Yansong, Li, Yongchun, Xue, Huan, Zheng, Zhong
Format Journal Article
LanguageEnglish
Published Basel MDPI AG 21.06.2022
MDPI
Subjects
AerMet100 steel
Analysis
Chemical properties
Corrosion
Corrosion fatigue
Corrosion resistance
Cutting force
Cutting parameters
Deformation
Dislocation density
Evolution
Fatigue
Fatigue testing machines
Finite element method
High strength steel
High strength steels
machining
Materials
Mathematical models
Mechanical properties
Metal fatigue
Methods
Microhardness
Microstructure
Phase transitions
Plastic deformation
Process parameters
Production processes
Steel
Steel, High strength
Strain
Structure
surface integrity
Surface preparation
Surface properties
Thickness
Transformation temperature
white layer
Workpieces
China
Online AccessGet full text

Cover

More Information
Summary:The machined-surface integrity plays a critical role in corrosion resistance and fatigue properties of ultra-high-strength steels. This work develops a multiphysics model for predicting the microstructure changes and microhardness of machined AerMet100 steel. The variations of stress, strain and temperature of the machined workpiece are evaluated by constructing a finite-element model of the orthogonal cutting process. Based on the multiphysics fields, the analytical models of phase transformation and dislocation density evolution are built up. The white layer is modeled according to the phase-transformation mechanism and the effects of stress and plastic strain on real phase-transformation temperature are taken into consideration. The microhardness changes are predicted by a model that accounts for both dislocation density and phase-transformation evolution processes. Experimental tests are carried out for model validation. The predicted results of cutting force, white-layer thickness and microhardness are in good agreement with the measured data. Additionally, from the proposed model, the correlation between the machined-surface characteristics and processing parameters is established.
Bibliography:ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 23
These authors contributed equally to this work and should be considered co-first authors.
ISSN:1996-1944
1996-1944
DOI:10.3390/ma15134395