|Table of Contents|

Mechanical properties of selective laser melted and shaped K4202 nickel-based superalloy at room temperature(PDF)

《火箭推进》[ISSN:1672-9374/CN:CN 61-1436/V]

Issue:
2017年03期
Page:
53-58
Research Field:
工艺与材料
Publishing date:

Info

Title:
Mechanical properties of selective laser melted and shaped K4202 nickel-based superalloy at room temperature
Author(s):
ZUO Wei;  ZHANG Quanming;  LEI Yue;  PENG Dongjian
Xi’an Space Engine Factory, Xi’an 710100, China
Keywords:
K4202 nickel-based superalloy;  selective laser melting;  mechanical property tests;  heat treatment
PACS:
V463-34
DOI:
-
Abstract:
In order to promote selective laser melting (SLM) to shaping of superalloy complicated structural components of liquid rocket, and meet its requirement, the mechanical property and strength mechanism of K4202 superalloy formed by SLM are analysed. The tensile tests were executed in the deposited state at room temperature. The mechanical performance index got from the tests shows a very strong anisotropy, even is close to or exceeds the standard value of GH4202 alloy forgings. Physical and chemical analysis means of optical micrographs (OM), scanning electron microscopy (SEM), energy dispersive spectroscopy(EDS), X-ray diffraction(XRD) etc. revealed its main strength mechanism, which is fine-grain strengthening , strain hardening and supersaturation solution strengthening. Three heat treatments of solution, solution aging and direct aging were studied in order to evaluate the influence on the mechanical properties of K4202 superalloy. The research result shows that the mechanical properties of the superalloy after direct aging heat treatment are the best.

References:

[1]VILAROA T, COLIN C, BARTOUT J D, et al. Sennour.Microstructural and mechanical approaches of the selective laser melting process applied to a nickel-base superalloy[J]. Materials science and engineering A 2012, 534: 446-451.
[2]MAISONNEUVE J. Direct manufacturing of aeronautical parts in Ti-6Al-4V and IN718: direct metal deposition and selective laser melting[D]. [s.l.]: Mines-ParisTech, 2008.
[3]VILARO T. Direct manufacturing of aeronautical parts in Nimonic 263 andA360 through selective laser melting: thermal, microstructural and mechanicalapproaches[D]. [S.l.]: Mines ParisTech, 2011.
[4]TRIVEDI R, KURZ W. Solidification microstructures: A conceptual approach[J]. Acta metallurgica materialia, 1994, 42(1): 15-23.
[5]胡汉起. 金属凝固原理[M]. 北京: 机械工业出版社, 1999.
[6]TOMUS D. Controlling the microstructure of Hastelloy-X components manufactured by selective laser melting[J]. Phys Proc, 2013 (41): 816-820.
[7]MERCELIS P, KRUTH J-P. Residual stresses in selective laser sintering and selective laser melting[J]. Rapid proto- typing J, 2006, 12(5): 254-265.
[8]TROSCH T, STR■βNER, V■LKL R, et al. Microstructure and mechanical properties of selective laser melted Inconel 718 compared to forging and casting [J]. Materials letters 2016 (164): 428-431.
[9]DIVYA V D, MUNOZ-MORENO R, MESSE O M, et al. Microstructure of selective laser melted CM247LC nickel-based superalloy and its evolution through heat treatment[J]. Materials characterization, 2016 (114): 62- 74.
[10]王建明, 杨舒宇. 镍基铸造高温合金[M]. 北京: 冶金工业出版社, 2014.

Memo

Memo:
-
Last Update: 1900-01-01