0
Research Papers

Effect of Different Heat Treatments on Mechanical Properties of Laser Sintered Additive Manufactured Parts

[+] Author and Article Information
Sagar Sarkar

Department of Mechanical Engineering,
Indian Institute of Technology Kharagpur,
Kharagpur 721302, West Bengal, India
e-mail: sagar.sarkar123@gmail.com

Cheruvu Siva Kumar

Department of Mechanical Engineering,
Indian Institute of Technology Kharagpur,
Kharagpur 721302, West Bengal, India
e-mail: kumar@mech.iitkgp.ernet.in

Ashish Kumar Nath

Department of Mechanical Engineering,
Indian Institute of Technology Kharagpur,
Kharagpur 721302, West Bengal, India
e-mail: aknath@mech.iitkgp.ernet.in

1Corresponding author.

Manuscript received July 19, 2017; final manuscript received July 21, 2017; published online September 13, 2017. Editor: Y. Lawrence Yao.

J. Manuf. Sci. Eng 139(11), 111010 (Sep 13, 2017) (11 pages) Paper No: MANU-17-1451; doi: 10.1115/1.4037437 History: Received July 19, 2017; Revised July 21, 2017

One of the most popular additive manufacturing processes is laser-based direct metal laser sintering (DMLS) process, which enables us to make complex three-dimensional (3D) parts directly from computer-aided design models. Due to layer-by-layer formation, parts built in this process tend to be anisotropic in nature. Suitable heat treatment can reduce this anisotropic behavior by changing the microstructure. Depending upon the applications, a wide range of mechanical properties can be achieved between 482 °C and 621 °C temperature for precipitation-hardened stainless steels. In the present study, effect of different heat treatment processes, namely solution annealing, aging, and overaging, on tensile strength, hardness, and wear properties has been studied in detail. Suitable metallurgical and mechanical characterization techniques have been applied wherever required, to support the experimental observations. Results show H900 condition gives highest yield strength and lowest tensile strain at break, whereas solution annealing gives lowest yield strength and as-built condition gives highest tensile strain at break. Scanning electron microscope (SEM) images show that H900 and H1150 condition produces brittle and ductile morphology, respectively, which in turn gives highest and lowest hardness value, respectively. X-ray diffraction (XRD) analysis shows presence of austenite phases, which can increase ductility at the cost of hardness. Average wear loss for H900 condition is highest, whereas it is lowest for solution annealed condition. Further optical and SEM images have been taken to understand the basic wear mechanism involved.

Copyright © 2017 by ASME
Your Session has timed out. Please sign back in to continue.

References

ASTM International, 2012, “ Standard Terminology for Additive Manufacturing Technologies (Withdrawn 2015),” ASTM International, West Conshohocken, PA, Standard No. ASTM F2792-12a. https://www.astm.org/Standards/F2792.htm
Spierings, A. B. , Starr, T. L. , and Wegener, K. , 2013, “ Fatigue Performance of Additive Manufactured Metallic Parts,” Rapid Prototyping J., 19(2), pp. 88–94. [CrossRef]
Viswanathan, U. K. , Banerjee, S. , and Krishnan, R. , 1988, “ Effects of Aging on the Microstructure of 17-4 PH Stainless Steel,” Mater. Sci. Eng.: A, 104(6), pp. 181–189. [CrossRef]
Hsu, K. , and Lin, C. , 2004, “ High-Temperature Fatigue Crack Growth Behavior of 17-4 PH Stainless Steels,” Metall. Mater. Trans. A, 35(9), pp. 3018–3024. [CrossRef]
EOS GmbH—Electro Optical Systems, 2017, “ Material Data Sheet EOS Stainless Steel PH1 for EOSINT M 290,” EOS GmbH - Electro Optical Systems, Munich, Germany, accessed Aug. 3, 2017, https://cdn2.scrvt.com/eos/2c79c109ca82d0e7/07f8e87d836c/SS-PH1-M290_Material_data_sheet_01-17_en.pdf
AK Steel Corporation, 2007, “ Product Data Bulletin 15-5 PH Stainless Steel,” AK Steel Corporation, West Chester Township, OH, accessed Aug. 3, 2017, http://www.aksteel.com/pdf/markets_products/stainless/precipitation/15-5_ph_data_sheet.pdf
Coffy, K. , 2014, “ Microstructure and Chemistry Evaluation of Direct Metal Laser Sintered 15-5 PH Stainless Steel,” Master's thesis, University of Central Florida, Orlando, FL. http://etd.fcla.edu/CF/CFE0005317/Coffy_Kevin_M_MS_Final.pdf
ASM International, 2005, “ Properties and Selection of Iron,” A. I. Committee, ASM Handbook, Vol. 1, ASM International, Materials Park, OH, pp. 1350–1352.
Boas, M. , and Rosen, A. , 1977, “ Effect of Load on the Adhesive Wear of Steels,” Wear, 44(2), pp. 213–222. [CrossRef]

Figures

Grahic Jump Location
Fig. 1

Particle size distribution of EOS SS PH1 powder

Grahic Jump Location
Fig. 2

Specimens deposited perpendicular to laser scan path

Grahic Jump Location
Fig. 3

Specimens after heat treatment

Grahic Jump Location
Fig. 4

Average yield strength of various heat treated DMLS specimens

Grahic Jump Location
Fig. 5

Average tensile strain at break of various heat treated DMLS specimens

Grahic Jump Location
Fig. 6

SEM images of fracture surfaces of tensile test specimens; as-built (a) and (b), Cond A (c) and (d), H900 (e) and (f), H1150 (g) and (h), MOD H900 (CA) (i) and (j), and MOD H900 (AB) (k) and (l)

Grahic Jump Location
Fig. 7

XRD analysis of different heat treated DMLS specimens

Grahic Jump Location
Fig. 8

Hardness values of different heat treated DMLS specimens

Grahic Jump Location
Fig. 9

Optical images of wear tracks; as-built (a), Cond A (b), H900 (c), H1150 (d), MOD H900 (CA) (e), and MOD H900 (AB) (f)

Grahic Jump Location
Fig. 10

Average wear rates of different heat treated DMLS specimens

Grahic Jump Location
Fig. 11

SEM images of wear tracks; as-built (a), (g), (m), (s), Cond A (b), (h), (n), (t), H900 (c), (i), (o), (u), H1150 (d), (j), (p), (v), MOD H900 (CA) (e), (k), (q), (w), and MOD H900 (AB) (f), (l), (r), (x)

Tables

Errata

Discussions

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