Control of intermetallic nano-particles through annealing in duplex low density steel

Alireza Rahnama; Stephen Spooner; Seetharaman Sridhar

doi:10.1016/j.matlet.2016.11.020

Control of intermetallic nano-particles through annealing in duplex low density steel

Alireza Rahnama, Stephen Spooner, Seetharaman Sridhar

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

17 Scopus citations

Abstract

In high Al-low-density steels for future vehicle light weighting, it is vital to design a thermal profile to form and retain the uniformly dispersed nanosize B2-type intermetallic precipitates that are crucial for the material strength. In this paper, the influence of heating rate, during annealing to 1050°C was simulated in a Au-image furnace. The post annealing structure was then characterized and two different morphologies of B2 particles were observed: triangle-like with a few micrometres (≈1.4 μm) and disk-like precipitates with a diameter of around a few hundred nanometres. It was found that a slower heating rate (2.5°C/s) led to an increase in the volume fraction and to uniform distribution of particles within the microstructure and considerably affected the shape and size of the precipitates.

Original language	English (US)
Pages (from-to)	13-16
Number of pages	4
Journal	Materials Letters
Volume	189
DOIs	https://doi.org/10.1016/j.matlet.2016.11.020
State	Published - Feb 15 2017
Externally published	Yes

Keywords

Heat treatment
Low density steel
Mechanical properties

ASJC Scopus subject areas

General Materials Science
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering

Access to Document

10.1016/j.matlet.2016.11.020

Cite this

@article{2765391a05b5412087a42a6032f2d33a,

title = "Control of intermetallic nano-particles through annealing in duplex low density steel",

abstract = "In high Al-low-density steels for future vehicle light weighting, it is vital to design a thermal profile to form and retain the uniformly dispersed nanosize B2-type intermetallic precipitates that are crucial for the material strength. In this paper, the influence of heating rate, during annealing to 1050°C was simulated in a Au-image furnace. The post annealing structure was then characterized and two different morphologies of B2 particles were observed: triangle-like with a few micrometres (≈1.4 μm) and disk-like precipitates with a diameter of around a few hundred nanometres. It was found that a slower heating rate (2.5°C/s) led to an increase in the volume fraction and to uniform distribution of particles within the microstructure and considerably affected the shape and size of the precipitates.",

keywords = "Heat treatment, Low density steel, Mechanical properties",

author = "Alireza Rahnama and Stephen Spooner and Seetharaman Sridhar",

note = "Publisher Copyright: {\textcopyright} 2016 Elsevier B.V.",

year = "2017",

month = feb,

day = "15",

doi = "10.1016/j.matlet.2016.11.020",

language = "English (US)",

volume = "189",

pages = "13--16",

journal = "Materials Letters",

issn = "0167-577X",

publisher = "Elsevier",

}

TY - JOUR

T1 - Control of intermetallic nano-particles through annealing in duplex low density steel

AU - Rahnama, Alireza

AU - Spooner, Stephen

AU - Sridhar, Seetharaman

PY - 2017/2/15

Y1 - 2017/2/15

N2 - In high Al-low-density steels for future vehicle light weighting, it is vital to design a thermal profile to form and retain the uniformly dispersed nanosize B2-type intermetallic precipitates that are crucial for the material strength. In this paper, the influence of heating rate, during annealing to 1050°C was simulated in a Au-image furnace. The post annealing structure was then characterized and two different morphologies of B2 particles were observed: triangle-like with a few micrometres (≈1.4 μm) and disk-like precipitates with a diameter of around a few hundred nanometres. It was found that a slower heating rate (2.5°C/s) led to an increase in the volume fraction and to uniform distribution of particles within the microstructure and considerably affected the shape and size of the precipitates.

AB - In high Al-low-density steels for future vehicle light weighting, it is vital to design a thermal profile to form and retain the uniformly dispersed nanosize B2-type intermetallic precipitates that are crucial for the material strength. In this paper, the influence of heating rate, during annealing to 1050°C was simulated in a Au-image furnace. The post annealing structure was then characterized and two different morphologies of B2 particles were observed: triangle-like with a few micrometres (≈1.4 μm) and disk-like precipitates with a diameter of around a few hundred nanometres. It was found that a slower heating rate (2.5°C/s) led to an increase in the volume fraction and to uniform distribution of particles within the microstructure and considerably affected the shape and size of the precipitates.

KW - Heat treatment

KW - Low density steel

KW - Mechanical properties

UR - http://www.scopus.com/inward/record.url?scp=84996477086&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84996477086&partnerID=8YFLogxK

U2 - 10.1016/j.matlet.2016.11.020

DO - 10.1016/j.matlet.2016.11.020

M3 - Article

AN - SCOPUS:84996477086

SN - 0167-577X

VL - 189

SP - 13

EP - 16

JO - Materials Letters

JF - Materials Letters

ER -

Control of intermetallic nano-particles through annealing in duplex low density steel

Abstract

Keywords

ASJC Scopus subject areas

Access to Document

Other files and links

Fingerprint

Cite this