Effect of different heat treatments on the microstructure and mechanical properties in selective laser melted INCONEL 718 alloy

被引：182

作者：

Raghavan, S. ^{[1
]}

Zhang, Baicheng ^{[1
]}

Wang, Pei ^{[2
]}

Sun, Chen-Nan ^{[1
]}

Nai, Mui Ling Sharon ^{[1
]}

Li, Tao ^{[1
]}

Wei, Jun ^{[1
]}

机构：

[1] Agcy Sci Technol & Res, Singapore Inst Mfg Technol, 73 Nanyang Dr, Singapore 637662, Singapore

[2] Agcy Sci Technol & Res, Inst Mat Res & Engn, Singapore, Singapore

来源：

MATERIALS AND MANUFACTURING PROCESSES | 2017年 / 32卷 / 14期

关键词：

Hardening; heat treatment; inconel alloy; microstructure; properties; selective laser melting; tensile; X-Ray; DEPOSITION; EVOLUTION; BEHAVIOR;

D O I：

10.1080/10426914.2016.1257805

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The microstructure and tensile properties of selective laser melted (SLM) Inconel 718 alloy were studied in the as-printed and different heat treat conditions. The SLM as-print microstructures exhibited columnar grain structures with very fine dendritic structure with segregation of elements. Apart from the standard heat treatment, three other heat treat cycle variants were carried out in an attempt to remove the extensive segregation of elements and modify the textured grain structure of the SLM as-print microstructure. Increasing the homogenization temperature reduced the segregation and coarsened the grain structure. However, the grains still remained columnar, and the material became softer with reduction in strength. After the ageing treatment, the tensile strength improved significantly for all the heat treated samples, which is typical for precipitation hardening of IN718 alloy. The microstructures of the heat treated samples exhibited the needle shaped delta, carbides, and finely dispersed gamma', gamma' phases.

引用

页码：1588 / 1595

页数：8

共 20 条

[1] Microstructures and mechanical behavior of Inconel 718 fabricated by selective laser melting [J].

Amato, K. N. ;

Gaytan, S. M. ;

Murr, L. E. ;

Martinez, E. ;

Shindo, P. W. ;

Hernandez, J. ;

Collins, S. ;

Medina, F. .

ACTA MATERIALIA, 2012, 60 (05) :2229-2239

[2]

[Anonymous], 1988, SUPERALLOYS

[3]

[Anonymous], 5664E AMS SAE INT

[4] INFLUENCE OF DIE FORGING PARAMETERS ON THE MICROSTRUCTURE AND PHASE COMPOSITION OF INCONEL 718 ALLOY [J].

Bunsch, A. ;

Kowalska, J. ;

Witkowska, M. .

ARCHIVES OF METALLURGY AND MATERIALS, 2012, 57 (04) :929-935

[5]

Chandler H.E., 1996, HEAT TREATERS GUIDE

[6] Effect of heat treatment on the microstructure and mechanical properties of Inconel 718 processed by selective laser melting [J].

Chlebus, E. ;

Gruber, K. ;

Kuznicka, B. ;

Kurzac, J. ;

Kurzynowski, T. .

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2015, 639 :647-655

[7]

Choi H.S., 1972, Journal of the Korean Nuclear Society, V4, P203

[8] Physical aspects of process control in selective laser sintering of metals [J].

Das, S .

ADVANCED ENGINEERING MATERIALS, 2003, 5 (10) :701-711

[9]

Davis J.R., 2000, ASM Specialty Handbook: Nickel, Cobalt, and Their Alloys

[10] Laser aided direct metal deposition of Inconel 625 superalloy: Microstructural evolution and thermal stability [J].

Dinda, G. P. ;

Dasgupta, A. K. ;

Mazumder, J. .

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2009, 509 (1-2) :98-104

← 1 2 →