Precipitate-dislocation interaction mediated Portevin-Le Chatelier-like effect in a beta-stabilized Ti-Mo-Nb-Al alloy

被引：33

作者：

Choudhuri, Deep ^{[1
]}

Mantri, Srinivas Aditya ^{[1
]}

Alam, Talukder ^{[1
]}

Banerjee, Srikumar ^{[3
]}

Banerjee, Rajarshi ^{[1
,2
]}

机构：

[1] Univ North Texas, Dept Mat Sci & Engn, Denton, TX 76191 USA

[2] Univ North Texas, Ctr Adv Res & Technol, Denton, TX 76191 USA

[3] Bhabha Atom Res Ctr, Bombay, Maharashtra, India

来源：

SCRIPTA MATERIALIA | 2016年 / 124卷

基金：

美国国家科学基金会;

关键词：

TITANIUM ALLOY; TRANSFORMATION; INSTABILITIES;

D O I：

10.1016/j.scriptamat.2016.06.043

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Portevin-Le Chatelier (PLC)-like effect was observed in a commercial alloy based on Ti-Mo-Nb-Al, which exhibited serrations in its tensile stress-strain response within a temperature-strain rate window. The serrations manifested as repeated load-drop and rise, and were rationalized on the basis of sudden plastic flow along the "soft" to precipitate free micro-slip-bands created by the passage of leading dislocations in the parent 13 matrix. Subsequently, dynamic precipitation of the a phase occurred within the co-free micro-slip-bands. These results demonstrate that the PLC -like effect can be manifested via precipitate-dislocation interactions, and is not limited to the traditionally accepted solute -dislocation interactions. (C) 2016 Elsevier Ltd. All rights reserved.

引用

页码：15 / 20

页数：6

共 21 条

[1] ANOMALOUS DIFFUSION OF ALUMINUM IN BETA-TITANIUM [J].

ARAKI, H ;

YAMANE, T ;

MINAMINO, Y ;

SAJI, S ;

HANA, Y ;

JUNG, SB .

METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE, 1994, 25 (04) :874-876

[2]

Banerjee S, 2007, PERGAMON MATER SER, V12, P1

[3] Plastic instability in an omega forming Ti-15% Mo alloy [J].

Banerjee, S ;

Naik, UM .

ACTA MATERIALIA, 1996, 44 (09) :3667-3677

[4] Experimental evidence of concurrent compositional and structural instabilities leading to ω precipitation in titanium-molybdenum alloys [J].

Devaraj, A. ;

Nag, S. ;

Srinivasan, R. ;

Williams, R. E. A. ;

Banerjee, S. ;

Banerjee, R. ;

Fraser, H. L. .

ACTA MATERIALIA, 2012, 60 (02) :596-609

[5]

Dieter GE., 1988, MECH METALLURGY, P26

[6] SIGNIFICANCE OF DYNAMIC STRAIN AGING IN TITANIUM [J].

GARDE, AM ;

SANTHANAM, AT ;

REEDHILL, RE .

ACTA METALLURGICA, 1972, 20 (02) :215-+

[7] Modeling the transformation texture of Ti-64 sheets after rolling in the beta-field [J].

Gey, N ;

Humbert, M ;

Philippe, MJ ;

Combres, Y .

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 1997, 230 (1-2) :68-74

[8] On the discontinuous yielding phenomena observed in a Nb-Ti-Al alloy [J].

Grylls, RJ ;

Banerjee, S ;

Perungulam, S ;

Wheeler, R ;

Fraser, HL .

INTERMETALLICS, 1998, 6 (7-8) :749-752

[9]

Hellman OC, 2000, MICROSC MICROANAL, V6, P437, DOI 10.1007/s100050010051

[10] A sensitivity analysis of the maximum separation method for the characterisation of solute clusters [J].

Hyde, J. M. ;

Marquis, E. A. ;

Wilford, K. B. ;

Williams, T. J. .

ULTRAMICROSCOPY, 2011, 111 (06) :440-447

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