Research Papers

Microstructures and Properties of Cu–AISI304 Parts Fabricated by Improved Selective Laser Sintering

[+] Author and Article Information
Z. L. Lu

State Key Laboratory for Manufacturing Systems Engineering, Xi’an Jiao Tong University, Xi’an 710049, China723LZL@163.com

J. H. Liu

 Heilongjiang University of Science and Technology, Harbin 150027, China

Y. S. Shi1

State Key Laboratory of Material Processing and Die and Mould Technology, HUST, Wuhan 430074, China


Corresponding author.

J. Manuf. Sci. Eng 131(4), 041018 (Jul 16, 2009) (6 pages) doi:10.1115/1.3168444 History: Received October 30, 2008; Revised June 05, 2009; Published July 16, 2009

For fabricating complex AISI304 parts with high performance by advanced powder/metallurgy technologies, cold isostatic pressing (CIP) is introduced into selective laser sintering (SLS) combined with hot isostatic pressing (HIP), which is abbreviated to selective laser sintering/isostatic pressed (SLS/IP). The effect of processing parameters on the densification of Cu–AISI304 parts is analyzed and then the influence of Cu on their relative densities, metallurgical structures, and mechanical performances are investigated. The results show that relative densities of Cu–AISI304 parts fabricated by SLS/IP are mainly influenced by CIP pressure and sintering temperature, and it is interesting to find that the formula 1D=(1D0)ekP is testified by the CIP of SLS/IP. There is an antidensification phenomenon resulting from Cu and AISI304 in liquid sintering, but the relative densities of Cu–AISI304 parts can be gradually improved in HIP with Cu content increasing from 1wt% to 3wt%. After the above-mentioned Cu–AIS304 parts are finally hot isostatic pressed, their metallurgical structures consist of sosoloid (Cu,Ni) and (Fe,Ni) besides austenite (Fe,Cr,Ni,C), their best mechanical performances are close to those of solution treated compact AISI304 when Cu content is 3wt%.

Copyright © 2009 by American Society of Mechanical Engineers
Your Session has timed out. Please sign back in to continue.



Grahic Jump Location
Figure 4

Micrographs of AISI304 specimens with different Cu contents in HIP

Grahic Jump Location
Figure 5

Micrographs of 3% Cu–AISI304 specimens in HIP

Grahic Jump Location
Figure 6

XRD of Cu–AISI304 specimens in HIP

Grahic Jump Location
Figure 7

Zoom drawings of the first, second, and third diffraction peaks in Fig. 6

Grahic Jump Location
Figure 8

SEM and fracture patterns of 3% Cu–AISI304 specimens in HIP

Grahic Jump Location
Figure 9

Fracture patterns of AISI304 specimens with different Cu contents in HIP (a) 1% Cu–AISI304, (b) 2% Cu–AISI304, and (c) 3% Cu–AISI304

Grahic Jump Location
Figure 10

SLS and SLS/IP parts of 3% Cu–AISI304

Grahic Jump Location
Figure 1

Relationship between microhardness and relative density of cold isostatic pressed specimens

Grahic Jump Location
Figure 2

Micrographs of AISI304 specimens cold isostatic pressed at different pressures: (a)–(f) imply 200 MPa, 300 MPa, 400 MPa, 500 MPa, 600 MPa, and 650 MPa, respectively

Grahic Jump Location
Figure 3

Fe–Cu phase diagram (part) (9)



Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging and repositioning the boxes below.

Related Journal Articles
Related eBook Content
Topic Collections

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In