Determining individual phase properties in a multi-phase Q&P steel using multi-scale indentation tests

G. Cheng; K. S. Choi; X. Hu; X. Sun

doi:10.1016/j.msea.2015.11.072

Determining individual phase properties in a multi-phase Q&P steel using multi-scale indentation tests

G. Cheng, K. S. Choi, X. Hu, X. Sun

Research output: Contribution to journal › Article › peer-review

86 Scopus citations

Abstract

A new inverse method was developed to predict the stress-strain behaviors of constituent phases in a multi-phase steel using the load-depth curves measured in nanoindentation tests combined with microhardness measurements. A power law hardening response was assumed for each phase, and an empirical relationship between hardness and yield strength was assumed. Adjustment was made to eliminate the indentation size effect and indenter bluntness effect. With the newly developed inverse method and statistical analysis of the hardness histogram for each phase, the average stress-strain curves of individual phases in a quench and partitioning (Q&P) steel, including austenite, tempered martensite and untempered martensite, were calculated and the results were compared with the phase properties obtained by in-situ high energy X-ray diffraction (HEXRD) test. It is demonstrated that multi-scale instrumented indentation tests together with the new inverse method are capable of determining the individual phase flow properties in multi-phase alloys.

Original language	English
Pages (from-to)	384-395
Number of pages	12
Journal	Materials Science and Engineering: A
Volume	652
DOIs	https://doi.org/10.1016/j.msea.2015.11.072
State	Published - Jan 15 2016
Externally published	Yes

Funding

Pacific Northwest National Laboratory (PNNL) is operated by Battelle Memorial Institute for the US Department of Energy (DOE) under Contract no. DE-AC05-76RL01830. This work was funded by the DOE's Vehicle Technologies Office under the Automotive Lightweight Materials Program managed by Dr. William Joost. The helps of Mr. Mark Taylor in the Advanced Steel Processing and Products Research Center at the Colorado School of Mines for the nanoindentation tests are greatly appreciated.

Funders	Funder number
U.S. Department of Energy	DE-AC05-76RL01830
Battelle
Vehicle Technologies Office

Keywords

Microstructure
Multi-phase
Nanoindentation
Plastic flow properties

Access to Document

10.1016/j.msea.2015.11.072

Cite this

@article{0a0a47da6c314c8698782c37fc953f80,

title = "Determining individual phase properties in a multi-phase Q&P steel using multi-scale indentation tests",

abstract = "A new inverse method was developed to predict the stress-strain behaviors of constituent phases in a multi-phase steel using the load-depth curves measured in nanoindentation tests combined with microhardness measurements. A power law hardening response was assumed for each phase, and an empirical relationship between hardness and yield strength was assumed. Adjustment was made to eliminate the indentation size effect and indenter bluntness effect. With the newly developed inverse method and statistical analysis of the hardness histogram for each phase, the average stress-strain curves of individual phases in a quench and partitioning (Q&P) steel, including austenite, tempered martensite and untempered martensite, were calculated and the results were compared with the phase properties obtained by in-situ high energy X-ray diffraction (HEXRD) test. It is demonstrated that multi-scale instrumented indentation tests together with the new inverse method are capable of determining the individual phase flow properties in multi-phase alloys.",

keywords = "Microstructure, Multi-phase, Nanoindentation, Plastic flow properties",

author = "G. Cheng and Choi, {K. S.} and X. Hu and X. Sun",

note = "Publisher Copyright: {\textcopyright} 2015 Elsevier B.V.",

year = "2016",

month = jan,

day = "15",

doi = "10.1016/j.msea.2015.11.072",

language = "English",

volume = "652",

pages = "384--395",

journal = "Materials Science and Engineering: A",

issn = "0921-5093",

publisher = "Elsevier",

}

TY - JOUR

T1 - Determining individual phase properties in a multi-phase Q&P steel using multi-scale indentation tests

AU - Cheng, G.

AU - Choi, K. S.

AU - Hu, X.

AU - Sun, X.

PY - 2016/1/15

Y1 - 2016/1/15

N2 - A new inverse method was developed to predict the stress-strain behaviors of constituent phases in a multi-phase steel using the load-depth curves measured in nanoindentation tests combined with microhardness measurements. A power law hardening response was assumed for each phase, and an empirical relationship between hardness and yield strength was assumed. Adjustment was made to eliminate the indentation size effect and indenter bluntness effect. With the newly developed inverse method and statistical analysis of the hardness histogram for each phase, the average stress-strain curves of individual phases in a quench and partitioning (Q&P) steel, including austenite, tempered martensite and untempered martensite, were calculated and the results were compared with the phase properties obtained by in-situ high energy X-ray diffraction (HEXRD) test. It is demonstrated that multi-scale instrumented indentation tests together with the new inverse method are capable of determining the individual phase flow properties in multi-phase alloys.

AB - A new inverse method was developed to predict the stress-strain behaviors of constituent phases in a multi-phase steel using the load-depth curves measured in nanoindentation tests combined with microhardness measurements. A power law hardening response was assumed for each phase, and an empirical relationship between hardness and yield strength was assumed. Adjustment was made to eliminate the indentation size effect and indenter bluntness effect. With the newly developed inverse method and statistical analysis of the hardness histogram for each phase, the average stress-strain curves of individual phases in a quench and partitioning (Q&P) steel, including austenite, tempered martensite and untempered martensite, were calculated and the results were compared with the phase properties obtained by in-situ high energy X-ray diffraction (HEXRD) test. It is demonstrated that multi-scale instrumented indentation tests together with the new inverse method are capable of determining the individual phase flow properties in multi-phase alloys.

KW - Microstructure

KW - Multi-phase

KW - Nanoindentation

KW - Plastic flow properties

UR - http://www.scopus.com/inward/record.url?scp=84951806726&partnerID=8YFLogxK

U2 - 10.1016/j.msea.2015.11.072

DO - 10.1016/j.msea.2015.11.072

M3 - Article

AN - SCOPUS:84951806726

SN - 0921-5093

VL - 652

SP - 384

EP - 395

JO - Materials Science and Engineering: A

JF - Materials Science and Engineering: A

ER -

Determining individual phase properties in a multi-phase Q&P steel using multi-scale indentation tests

Abstract

Funding

Keywords

Access to Document

Other files and links

Fingerprint

Cite this