Microstructure and tensile properties of Inconel 718 pulsed Nd-YAG laser welds

被引：239

作者：

Ram, GDJ ^{[1
]}

Reddy, AV

Rao, KP

Reddy, GM

Sundar, JKS

机构：

[1] Reg Ctr Mil Airworthiness Mat, Hyderabad, Andhra Pradesh, India

[2] Indian Inst Technol, Dept Met Engn, Madras 600036, Tamil Nadu, India

[3] Def Met Res Lab, Hyderabad 500258, Andhra Pradesh, India

[4] Int Adv Res Ctr Power Met & New Mat, Ctr Laser Proc Mat, Hyderabad, Andhra Pradesh, India

来源：

JOURNAL OF MATERIALS PROCESSING TECHNOLOGY | 2005年 / 167卷 / 01期

关键词：

laser welding; alloy; 718; Laves phase; Nb segregation; post-weld heat treatments;

D O I：

10.1016/j.jmatprotec.2004.09.081

中图分类号：

T [工业技术];

学科分类号：

08 [工学];

摘要：

Pulsed Nd-YAG laser welding characteristics of Inconel 718 sheet material (2 mm thick) were investigated. Welds were subjected to three different post-weld heat treatments: direct aging, 980 degrees C solution treatment+ aging (980STA), and 1080 degrees C solution treatment + aging (1080STA). Weld microstructures and room temperature tensile properties were evaluated. Weld tensile properties in direct aged condition were found to be inferior in relation to the base metal due to the presence of Nb-rich brittle intermetallic Laves phase in fusion zone microstructure. Solution treatment at 980 degrees C was found to result in considerable dissolution of Laves phase, leading to some improvement in weld properties, though not to the level of base metal. The treatment was also found to result in precipitation of needle-like 8-phase around partially dissolved Laves particles. Solution treatment at 1080 degrees C was found to result in complete dissolution of Laves phase, but also in significant grain coarsening in the base metal, which led to considerable deterioration in base metal properties. (c) 2004 Elsevier B.V. All rights reserved.

引用

页码：73 / 82

页数：10

共 20 条

[1]

*AMS, 1984, 5596E AMS

[2]

Cam G, 1998, INT MATER REV, V43, P1

[3]

CIESLAK MJ, 1989, C P SUP, V718, P59

[4]

David S.A., 1992, C P TRENDS WELD RES, P147

[5]

Dupont JN, 1998, WELD J, V77, p417S

[6]

High powder CO2 and Nd-YAG laser welding of wrought inconel 718 [J].

Gobbi, S ;

Zhang, L ;

Norris, J ;

Richter, KH ;

Loreau, JH .

JOURNAL OF MATERIALS PROCESSING TECHNOLOGY, 1996, 56 (1-4) :333-345

[7]

GORDINE J, 1971, WELD J, V11, pS480

[8]

JAMES LA, 1978, WELD J, V1, pS17

[9]

LINGENFELTER A, 1989, C P SUP 718 MET APPL, V718, P673

[10]

McCay M. H., 1991, C P SUP, P719

← 1 2 →