Machining-induced grain refinement of AISI 4340 alloy steel under dry and cryogenic conditions

Research output: Contribution to journalArticle

Abstract

Machining significantly influences surface integrity, metallurgical structure, grain size and thereby the mechanical, chemical and physical properties of the component. The presented investigation concentrates on grain refinement in turning of AISI 4340 alloy steel in dry and cryogenic turning. With cutting temperatures below 950 °C, the resulted surface layer consists of a microstructure with ultrafine white globular particles in all samples. A higher percentage of these particles was observed when using cryogenic flushing. It resulted in improved surface and subsurface properties in terms of ultrafine microstructure concentration, higher micro hardness, influence on the thickness and composition of the surface, and subsurface layers and thermal stability.

Original languageEnglish
Pages (from-to)4347-4353
Number of pages7
JournalJournal of Materials Research and Technology
Volume8
Issue number5
DOIs
Publication statusPublished - 1 Sep 2019

Fingerprint

Grain refinement
Alloy steel
Cryogenics
Machining
Microstructure
Crystal microstructure
Microhardness
Chemical properties
Thermodynamic stability
Physical properties
Mechanical properties
Chemical analysis
Temperature
Ultrafine

Keywords

  • AISI 4340 alloy steel
  • Cryogenic machining
  • Globular particle

ASJC Scopus subject areas

  • Ceramics and Composites
  • Biomaterials
  • Surfaces, Coatings and Films
  • Metals and Alloys

Cite this

@article{7cbd55a6ea6d4da290439fa50aeb9a1c,
title = "Machining-induced grain refinement of AISI 4340 alloy steel under dry and cryogenic conditions",
abstract = "Machining significantly influences surface integrity, metallurgical structure, grain size and thereby the mechanical, chemical and physical properties of the component. The presented investigation concentrates on grain refinement in turning of AISI 4340 alloy steel in dry and cryogenic turning. With cutting temperatures below 950 °C, the resulted surface layer consists of a microstructure with ultrafine white globular particles in all samples. A higher percentage of these particles was observed when using cryogenic flushing. It resulted in improved surface and subsurface properties in terms of ultrafine microstructure concentration, higher micro hardness, influence on the thickness and composition of the surface, and subsurface layers and thermal stability.",
keywords = "AISI 4340 alloy steel, Cryogenic machining, Globular particle",
author = "Raof, {Natasha A.} and {A Ghani}, Jaharah and {Che Haron}, {Che Hassan}",
year = "2019",
month = "9",
day = "1",
doi = "10.1016/j.jmrt.2019.07.045",
language = "English",
volume = "8",
pages = "4347--4353",
journal = "Journal of Materials Research and Technology",
issn = "2238-7854",
publisher = "Elsevier Editora Ltda",
number = "5",

}

TY - JOUR

T1 - Machining-induced grain refinement of AISI 4340 alloy steel under dry and cryogenic conditions

AU - Raof, Natasha A.

AU - A Ghani, Jaharah

AU - Che Haron, Che Hassan

PY - 2019/9/1

Y1 - 2019/9/1

N2 - Machining significantly influences surface integrity, metallurgical structure, grain size and thereby the mechanical, chemical and physical properties of the component. The presented investigation concentrates on grain refinement in turning of AISI 4340 alloy steel in dry and cryogenic turning. With cutting temperatures below 950 °C, the resulted surface layer consists of a microstructure with ultrafine white globular particles in all samples. A higher percentage of these particles was observed when using cryogenic flushing. It resulted in improved surface and subsurface properties in terms of ultrafine microstructure concentration, higher micro hardness, influence on the thickness and composition of the surface, and subsurface layers and thermal stability.

AB - Machining significantly influences surface integrity, metallurgical structure, grain size and thereby the mechanical, chemical and physical properties of the component. The presented investigation concentrates on grain refinement in turning of AISI 4340 alloy steel in dry and cryogenic turning. With cutting temperatures below 950 °C, the resulted surface layer consists of a microstructure with ultrafine white globular particles in all samples. A higher percentage of these particles was observed when using cryogenic flushing. It resulted in improved surface and subsurface properties in terms of ultrafine microstructure concentration, higher micro hardness, influence on the thickness and composition of the surface, and subsurface layers and thermal stability.

KW - AISI 4340 alloy steel

KW - Cryogenic machining

KW - Globular particle

UR - http://www.scopus.com/inward/record.url?scp=85071902707&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85071902707&partnerID=8YFLogxK

U2 - 10.1016/j.jmrt.2019.07.045

DO - 10.1016/j.jmrt.2019.07.045

M3 - Article

AN - SCOPUS:85071902707

VL - 8

SP - 4347

EP - 4353

JO - Journal of Materials Research and Technology

JF - Journal of Materials Research and Technology

SN - 2238-7854

IS - 5

ER -