16

Acta Materialia 51 (2003) 1453–1468 www.actamat-journals.com Extension of the N-model to predict competing homogeneous and heterogeneous precipitation in Al-Sc alloys J.D. Robson ∗ , M.J. Jones 1 , P.B. Prangnell Manchester Materials Science Centre, Grosvenor Street, Manchester M1 7HS, UK Received 22 August 2002; received in revised form 9 October 2002; accepted 28 October 2002 Abstract A model has been developed to predict the precipitation and coarsening kinetics of the Al 3 Sc phase in Al-Sc alloys. This model is based on the N-model framework of Kampmann and Wagner (KWN), extended to account for competition between heterogeneous nucleation on dislocations and homogeneous nucleation. The predictions of the model have been tested against experimental data in the literature and also new experimental results, which are reported in this paper. Both the predicted particle size distributions and the evolution of particle size with time are in good agreement with the experimental data. The model correctly predicts the transition from homogeneous to heterogeneous domination of nucleation, as the ageing temperature is increased, and has been used to investigate the nucleation behaviour in detail. TTT diagrams for the precipitation of Al 3 Sc have also been predicted for Al-Sc alloys. © 2003 Acta Materialia Inc. Published by Elsevier Science Ltd. All rights reserved. Keywords: Aluminium alloys; Nucleation of phase transformations; Phase transformation kinetics; Coarsening; Modelling 1. Intro ductio n The addition of small quantities of scandium to aluminium alloys can lead to a number of benefits, including grain refinement, an increase in strength and enhance d res ist anc e to recr yst allization [1]. These effects can largely be attributed to the pres- ∗ Corresponding author. Tel.: +44-1612-00360 9; fax: +44- 1612-003586. E-mail address: [email protected] (J.D. Robson). 1 Now at Mate ´ riels De ´ partement, Ecole Nationale Supe ´ rieure des Mines de Saint-Etienne, 158, Cours Fauriel, 42023, Saint- Etienne Cedex 2, France 1359-6454/03/$30.00 © 2003 Acta Materialia Inc. Published by Elsevier Science Ltd. All rights reserved. doi:10.1016/S1359-6454(02)00540-2 ence of the L1 2 Al 3 Sc trialuminide phase. For hyp- ereute ctic alloys (Sc0.4 7wt %), this for ms as a pr imary phase fr om li quid al uminium, and is a powerful grain refiner [2]. For hypoeutectic alloys (wit h typi cal Sc conce nt rations 0.3wt%), the scand ium can be taken into soli d solution af ter castin g and then pre cip itated as a dis per sion of Al 3 Sc particles by a suitable ageing treatment. The L1 2 Al 3 Sc ph a se h as a l at t ic e pa r am et er of 0.4105nm [3], which is only 1.6% greater than that of the aluminium matrix. As a result of this, and the similar crystal structures of the precipitate and matrix, Al 3 Sc often precipitates homogeneously as fine , ful ly cohe rent par tic les [4, 5]. Fur the rmore,

2003-Acta Mater Al3Sc in Al-Sc Alloy

Download PDF Report

Upload
yaswanth1992
View
217
Download
0

Embed Size (px)

Citation preview

Page 1: 2003-Acta Mater Al3Sc in Al-Sc Alloy

8/12/2019 2003-Acta Mater Al3Sc in Al-Sc Alloy

http://slidepdf.com/reader/full/2003-acta-mater-al3sc-in-al-sc-alloy 1/16

Page 2: 2003-Acta Mater Al3Sc in Al-Sc Alloy

8/12/2019 2003-Acta Mater Al3Sc in Al-Sc Alloy

http://slidepdf.com/reader/full/2003-acta-mater-al3sc-in-al-sc-alloy 2/16

Page 3: 2003-Acta Mater Al3Sc in Al-Sc Alloy

8/12/2019 2003-Acta Mater Al3Sc in Al-Sc Alloy

http://slidepdf.com/reader/full/2003-acta-mater-al3sc-in-al-sc-alloy 3/16

Page 4: 2003-Acta Mater Al3Sc in Al-Sc Alloy

8/12/2019 2003-Acta Mater Al3Sc in Al-Sc Alloy

http://slidepdf.com/reader/full/2003-acta-mater-al3sc-in-al-sc-alloy 4/16

Page 5: 2003-Acta Mater Al3Sc in Al-Sc Alloy

8/12/2019 2003-Acta Mater Al3Sc in Al-Sc Alloy

http://slidepdf.com/reader/full/2003-acta-mater-al3sc-in-al-sc-alloy 5/16

Page 6: 2003-Acta Mater Al3Sc in Al-Sc Alloy

8/12/2019 2003-Acta Mater Al3Sc in Al-Sc Alloy

http://slidepdf.com/reader/full/2003-acta-mater-al3sc-in-al-sc-alloy 6/16

Page 7: 2003-Acta Mater Al3Sc in Al-Sc Alloy

8/12/2019 2003-Acta Mater Al3Sc in Al-Sc Alloy

http://slidepdf.com/reader/full/2003-acta-mater-al3sc-in-al-sc-alloy 7/16

Page 8: 2003-Acta Mater Al3Sc in Al-Sc Alloy

8/12/2019 2003-Acta Mater Al3Sc in Al-Sc Alloy

http://slidepdf.com/reader/full/2003-acta-mater-al3sc-in-al-sc-alloy 8/16

Page 9: 2003-Acta Mater Al3Sc in Al-Sc Alloy

8/12/2019 2003-Acta Mater Al3Sc in Al-Sc Alloy

http://slidepdf.com/reader/full/2003-acta-mater-al3sc-in-al-sc-alloy 9/16

Page 10: 2003-Acta Mater Al3Sc in Al-Sc Alloy

8/12/2019 2003-Acta Mater Al3Sc in Al-Sc Alloy

http://slidepdf.com/reader/full/2003-acta-mater-al3sc-in-al-sc-alloy 10/16

Page 11: 2003-Acta Mater Al3Sc in Al-Sc Alloy

8/12/2019 2003-Acta Mater Al3Sc in Al-Sc Alloy

http://slidepdf.com/reader/full/2003-acta-mater-al3sc-in-al-sc-alloy 11/16

Page 12: 2003-Acta Mater Al3Sc in Al-Sc Alloy

8/12/2019 2003-Acta Mater Al3Sc in Al-Sc Alloy

http://slidepdf.com/reader/full/2003-acta-mater-al3sc-in-al-sc-alloy 12/16

Page 13: 2003-Acta Mater Al3Sc in Al-Sc Alloy

8/12/2019 2003-Acta Mater Al3Sc in Al-Sc Alloy

http://slidepdf.com/reader/full/2003-acta-mater-al3sc-in-al-sc-alloy 13/16

Page 14: 2003-Acta Mater Al3Sc in Al-Sc Alloy

8/12/2019 2003-Acta Mater Al3Sc in Al-Sc Alloy

http://slidepdf.com/reader/full/2003-acta-mater-al3sc-in-al-sc-alloy 14/16

Page 15: 2003-Acta Mater Al3Sc in Al-Sc Alloy

8/12/2019 2003-Acta Mater Al3Sc in Al-Sc Alloy

http://slidepdf.com/reader/full/2003-acta-mater-al3sc-in-al-sc-alloy 15/16

Page 16: 2003-Acta Mater Al3Sc in Al-Sc Alloy

8/12/2019 2003-Acta Mater Al3Sc in Al-Sc Alloy

http://slidepdf.com/reader/full/2003-acta-mater-al3sc-in-al-sc-alloy 16/16

8.00 Salve Mater misericordiae, Salve Madre di misericordia, Mater Dei et Mater veniae, Madre di Dio e Madre del perdono, Mater spei et Mater gratiae,

8.00 Salve Mater misericordiae, Salve Madre di misericordia, Mater Dei et Mater veniae, Madre di Dio e Madre del perdono, Mater spei et Mater gratiae,

Documents

Acta metall, mater. ~ Pergamonmpfs/papers/SF1994Microbuckle.pdf · 2220 SUTCLIFFE and FLECK: MICROBUCKLE PROPAGATION IN COMPOSITES from the free edge. Similar partially formed kink

Acta metall, mater. ~ Pergamonmpfs/papers/SF1994Microbuckle.pdf · 2220 SUTCLIFFE and FLECK: MICROBUCKLE PROPAGATION IN COMPOSITES from the free edge. Similar partially formed kink

Documents

High Alloy Steel & Ni-based Alloy

High Alloy Steel & Ni-based Alloy

Documents

Acta Mater 57 (2009) 559 Investigation Of The Indentation Size Effect

Acta Mater 57 (2009) 559 Investigation Of The Indentation Size Effect

Documents

OXFORD ALLOYS, INC. COATED ELECTRODES Nickel Alloys Oxford Alloy A 10 Oxford Alloy C-276 11 Oxford Alloy 55 12 Oxford Alloy 59 13 Oxford Alloy 99 14 Oxford Alloy 112 15 Oxford Alloy

OXFORD ALLOYS, INC. COATED ELECTRODES Nickel Alloys Oxford Alloy A 10 Oxford Alloy C-276 11 Oxford Alloy 55 12 Oxford Alloy 59 13 Oxford Alloy 99 14 Oxford Alloy 112 15 Oxford Alloy

Documents

Interior & Exterior Custom Accessories...Alloy Interior Alloy Interior Alloy Interior Alloy Interior - Alloy with Chrome Finish - 6617 - Rectangular 5" W x 21/ 2" screw in - Alloy

Interior & Exterior Custom Accessories...Alloy Interior Alloy Interior Alloy Interior Alloy Interior - Alloy with Chrome Finish - 6617 - Rectangular 5" W x 21/ 2" screw in - Alloy

Documents

Acta Mater Vol 60 2012-Heat Treated Pearlite

Acta Mater Vol 60 2012-Heat Treated Pearlite

Documents

Stabat Mater, No. 6, Quartetto- 'Sancta Mater, Istud Agas

Stabat Mater, No. 6, Quartetto- 'Sancta Mater, Istud Agas

Documents

prega si salva cinese... · Mater castissima Mater inviolata Mater intemerata 46. 47 Mater amabilis Mater admirabilis Mater boni consilii Mater Creatoris Mater Salvatoris Virgo prudentissima

prega si salva cinese... · Mater castissima Mater inviolata Mater intemerata 46. 47 Mater amabilis Mater admirabilis Mater boni consilii Mater Creatoris Mater Salvatoris Virgo prudentissima

Documents

Acta Mater 2012

Acta Mater 2012

Documents

19.00 Mater Christi Mater Ecclesiae Mater Salvatoris Virgo fidelis Mater amabilis Mater purissima

19.00 Mater Christi Mater Ecclesiae Mater Salvatoris Virgo fidelis Mater amabilis Mater purissima

Documents

Alloy & Alloy Analyzer

Alloy & Alloy Analyzer

Documents

Alloy, Alloy Analyzer, Data Modeling and Analysis with Alloy

Alloy, Alloy Analyzer, Data Modeling and Analysis with Alloy

Documents

Design

Arch. Metall. Mater. 62 (2017), 1, 187-194 - IMIM · Keywords: silicon dendrites, casting die cooling, water mist, hypereutectic Al-Si alloy 1. Introduction The use of water mist

Arch. Metall. Mater. 62 (2017), 1, 187-194 - IMIM · Keywords: silicon dendrites, casting die cooling, water mist, hypereutectic Al-Si alloy 1. Introduction The use of water mist

Documents

Solennità ta' l-l '1@lf!iS[]l)santamarija.com/.../05/Solennitta-ta-l...sema-Patruna-ta-l-Imqabba.pdf · Mater castissima Mater inviolata Mater intemerata Mater amabi/is Mater admirabi/is

Solennità ta' l-l '1@lf!iS[]l)santamarija.com/.../05/Solennitta-ta-l...sema-Patruna-ta-l-Imqabba.pdf · Mater castissima Mater inviolata Mater intemerata Mater amabi/is Mater admirabi/is

Documents

Acta Mater 2014 carbon partitioning mart[...]

Acta Mater 2014 carbon partitioning mart[...]

Documents

Long-Term Clinical Performance of Fixed FDPs Depends on ... Lecture Restor Dent Mater IADR SanDieg.pdfMar 17, 2011 · Gold casting alloy+AcrylicFDPs Highly successful periodontal-prosthodontic

Long-Term Clinical Performance of Fixed FDPs Depends on ... Lecture Restor Dent Mater IADR SanDieg.pdfMar 17, 2011 · Gold casting alloy+AcrylicFDPs Highly successful periodontal-prosthodontic

Documents

Documents

Documents

Stabat Mater 1. Duetto Stabat Mater dolorosaconquest.imslp.info/files/imglnks/usimg/9/91/IMSLP256346...Stabat Mater 1. Duetto "Stabat Mater dolorosa" Giovanni Battista Pergolesi &

Stabat Mater 1. Duetto Stabat Mater dolorosaconquest.imslp.info/files/imglnks/usimg/9/91/IMSLP256346...Stabat Mater 1. Duetto "Stabat Mater dolorosa" Giovanni Battista Pergolesi &

Documents

Documents

Antonín Dvorˇák Stabat Mater Antonín Dvorák ˇ Stabat Mater ... · Stabat Mater Antonín Dvorákˇ s „Stabat Mater“ gehört mit Si-cherheit zu den schönsten oratorischen

Antonín Dvorˇák Stabat Mater Antonín Dvorák ˇ Stabat Mater ... · Stabat Mater Antonín Dvorákˇ s „Stabat Mater“ gehört mit Si-cherheit zu den schönsten oratorischen

Documents

High Entropy Shape Memory Alloys (HESMA) Alloy ... · High Entropy Shape Memory Alloys. Processing of HESMAs 11. Alloy composition and PTTs 12 (Frenzel et al., Acta Mat. 58, 2010)

High Entropy Shape Memory Alloys (HESMA) Alloy ... · High Entropy Shape Memory Alloys. Processing of HESMAs 11. Alloy composition and PTTs 12 (Frenzel et al., Acta Mat. 58, 2010)

Documents

ONS 2016 - morevalves.nomorevalves.no/wp-content/uploads/2016/08/ICE-catalogue-ONS2016.pdf · Alloy 20, Alloy 600 and 601, Alloy 800H, Alloy 500, Alloy 316, Alloy 926, Alloy C706,

ONS 2016 - morevalves.nomorevalves.no/wp-content/uploads/2016/08/ICE-catalogue-ONS2016.pdf · Alloy 20, Alloy 600 and 601, Alloy 800H, Alloy 500, Alloy 316, Alloy 926, Alloy C706,

Documents

Keywords : Alloy, carbon steels, low-alloy steels, high-alloy steels

Keywords : Alloy, carbon steels, low-alloy steels, high-alloy steels

Documents

Acta mater. Vol. 45, (1997) pp 1137-115[...]

Acta mater. Vol. 45, (1997) pp 1137-115[...]

Documents

Atomistic Simulations Ju Li, Libor Kovarik. 8 nm Mishin, Acta Mater. 52 (2004) 1451 Ardell & Ozolins, Nature Mater. 4 (2005) 309

Atomistic Simulations Ju Li, Libor Kovarik. 8 nm Mishin, Acta Mater. 52 (2004) 1451 Ardell & Ozolins, Nature Mater. 4 (2005) 309

Documents

Mater HERBAFARM

Mater HERBAFARM

Education

STABAT MATER · 2020. 6. 10. · STABAT MATER JOHN DOWLAND Lachrimae ENRICO LAVARINI Stabat mater ANTONIO VIVALDI Estro armonico, Stabat mater Martina Gmeinder, Alt Branko Simic,

STABAT MATER · 2020. 6. 10. · STABAT MATER JOHN DOWLAND Lachrimae ENRICO LAVARINI Stabat mater ANTONIO VIVALDI Estro armonico, Stabat mater Martina Gmeinder, Alt Branko Simic,

Documents