Formation of secondary austenite during the α′-γ transformation in an FeNiMn alloy

Jogender Singh, C. M. Wayman

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

Optical and electron microscopy have been employed to study structural changes in an FeNiMn martensite (α′) during heating. The reverse transformation (α′ → γs) occurs between 500 and 600°C and appears to be divided into three classes. The first is a long-range diffusional transformation which occurs by nucleation and growth. This type of reversion is observed on slow heating (5°C s-1). The formation of secondary austenite (γs) is observed at the lath interfaces. The second is a short-range diffusional transformation observed on heating at intermediate rates (approximately 50°C s-1) which results in a refined, equiaxed austenite and resembles a massive transformation. The third is a diffusionless transformation observed on fast heating (100°C s-1) and appears to be martensitic in nature.

Original languageEnglish (US)
Pages (from-to)227-233
Number of pages7
JournalMaterials Science and Engineering
Volume93
Issue numberC
DOIs
StatePublished - Jan 1 1987

Fingerprint

Austenite
Heating
Martensite
Electron microscopy
Optical microscopy
Nucleation

All Science Journal Classification (ASJC) codes

  • Engineering(all)

Cite this

@article{50ba6081b73a4c6cb6bd1ba2ad5b5553,
title = "Formation of secondary austenite during the α′-γ transformation in an FeNiMn alloy",
abstract = "Optical and electron microscopy have been employed to study structural changes in an FeNiMn martensite (α′) during heating. The reverse transformation (α′ → γs) occurs between 500 and 600°C and appears to be divided into three classes. The first is a long-range diffusional transformation which occurs by nucleation and growth. This type of reversion is observed on slow heating (5°C s-1). The formation of secondary austenite (γs) is observed at the lath interfaces. The second is a short-range diffusional transformation observed on heating at intermediate rates (approximately 50°C s-1) which results in a refined, equiaxed austenite and resembles a massive transformation. The third is a diffusionless transformation observed on fast heating (100°C s-1) and appears to be martensitic in nature.",
author = "Jogender Singh and Wayman, {C. M.}",
year = "1987",
month = "1",
day = "1",
doi = "10.1016/0025-5416(87)90428-9",
language = "English (US)",
volume = "93",
pages = "227--233",
journal = "Materials Science and Engineering",
issn = "0025-5416",
publisher = "Elsevier BV",
number = "C",

}

Formation of secondary austenite during the α′-γ transformation in an FeNiMn alloy. / Singh, Jogender; Wayman, C. M.

In: Materials Science and Engineering, Vol. 93, No. C, 01.01.1987, p. 227-233.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Formation of secondary austenite during the α′-γ transformation in an FeNiMn alloy

AU - Singh, Jogender

AU - Wayman, C. M.

PY - 1987/1/1

Y1 - 1987/1/1

N2 - Optical and electron microscopy have been employed to study structural changes in an FeNiMn martensite (α′) during heating. The reverse transformation (α′ → γs) occurs between 500 and 600°C and appears to be divided into three classes. The first is a long-range diffusional transformation which occurs by nucleation and growth. This type of reversion is observed on slow heating (5°C s-1). The formation of secondary austenite (γs) is observed at the lath interfaces. The second is a short-range diffusional transformation observed on heating at intermediate rates (approximately 50°C s-1) which results in a refined, equiaxed austenite and resembles a massive transformation. The third is a diffusionless transformation observed on fast heating (100°C s-1) and appears to be martensitic in nature.

AB - Optical and electron microscopy have been employed to study structural changes in an FeNiMn martensite (α′) during heating. The reverse transformation (α′ → γs) occurs between 500 and 600°C and appears to be divided into three classes. The first is a long-range diffusional transformation which occurs by nucleation and growth. This type of reversion is observed on slow heating (5°C s-1). The formation of secondary austenite (γs) is observed at the lath interfaces. The second is a short-range diffusional transformation observed on heating at intermediate rates (approximately 50°C s-1) which results in a refined, equiaxed austenite and resembles a massive transformation. The third is a diffusionless transformation observed on fast heating (100°C s-1) and appears to be martensitic in nature.

UR - http://www.scopus.com/inward/record.url?scp=0023404038&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0023404038&partnerID=8YFLogxK

U2 - 10.1016/0025-5416(87)90428-9

DO - 10.1016/0025-5416(87)90428-9

M3 - Article

AN - SCOPUS:0023404038

VL - 93

SP - 227

EP - 233

JO - Materials Science and Engineering

JF - Materials Science and Engineering

SN - 0025-5416

IS - C

ER -