Microstructure evolution during hot deformation of as cast ESR-CDSed superalloy Rene88DT

被引：4

作者：

Li, F. ^{[1
]}

Fu, R. ^{[1
]}

Feng, D. ^{[1
]}

Tian, Z. ^{[1
]}

机构：

[1] Cent Iron & Steel Res Inst, Superalloys Dept, Beijing 100081, Peoples R China

来源：

MATERIALS RESEARCH INNOVATIONS | 2014年 / 18卷

关键词：

Hot deformation; Dynamic recrystallisation; ESR-CDSed Rene88DT; Nucleation; Subgrain rotation; DYNAMIC RECRYSTALLIZATION; NUCLEATION; ALUMINUM; COPPER; IN-718; ALLOY;

D O I：

10.1179/1432891714Z.000000000720

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The microstructure evolution during hot deformation of directionally solidified disc alloy Rene88DT produced by electroslag remelting continuous directionally solidification (ESR-CDS) was investigated by using optical microscope and electron backscatter diffraction technique. Hot compression tests were conducted at different strains at temperatures ranging from 1060 to 1140 degrees C for strain rates between 0.001 and 1 s(-1). Experimental results revealed that the process of dynamic recrystallisation (DRX) in as cast ESR-CDSed Rene88DT alloy can be classified into three periods, namely, incubation, nucleation and growth. Deformation temperature plays a significant role in recrystallisation grain nucleation and migration, which reveals that the size and fraction of DRX grain increases with the increasing temperature. Dynamic softening mechanisms vary depending on the hot deformation temperature. The microstructure evolutions during DRX are characterised in view of subgrain coarsening and strain induced grain boundary migration near the original columnar grain boundary.

引用

页码：421 / 428

页数：8

共 21 条

[1]

ARDAKANI MG, 1992, RECRYSTALLIZATION

[2]

FU R, POSTDOCTORAL R UNPUB

[3]

FU R, 2010, Patent No. 2010106140360

[4]

Fu Rui, 2011, Journal of Aeronautical Materials, V31, P8, DOI 10.3969/j.issn.1005-5053.2011.3.002

[5]

GARCIA CI, 1994, SUPERALLOYS 718, 625, 706 AND VARIOUS DERIVATIVES, P293

[6]

GARDNER KJ, 1979, METALL SCI, V13, P13

[7]

GOUEDET S, 2000, MAT SCI ENG A-STRUCT, V283, P274

[8] An experimental study of the recrystallization mechanism during hot deformation of aluminium [J].

Gourdet, S ;

Montheillet, F .

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2000, 283 (1-2) :274-288

[9] DEFORMATION PROCESSES IN HOT WORKED COPPER AND ALPHA-BRASS [J].

HATHERLY, M ;

MALIN, AS ;

CARMICHAEL, CM ;

HUMPHREYS, FJ ;

HIRSCH, J .

ACTA METALLURGICA, 1986, 34 (11) :2247-2257

[10]

Humphreys F.J., 2005, RECRYSTALLIZATION RE

← 1 2 3 →