Local characterization of stainless steel 17-4PH produced by material extrusion additive manufacturing: Influence of the post-treatment

被引：7

作者：

Gong, Claire ^{[1
]}

Djouda, Joseph Marae ^{[2
,3
]}

Hmima, Abdelhamid ^{[1
]}

Gaslain, Fabrice ^{[4
]}

Kauffmann, Julien ^{[2
]}

Chemkhi, Mahdi ^{[2
,5
]}

Maurer, Thomas ^{[1
]}

Panicaud, Benoit ^{[5
]}

机构：

[1] Univ Technol Troyes, Light Nanomat Nanotechnol, CNRS EMR 7004, F-10000 Troyes, France

[2] EPF Grad Sch Engn, 2 Rue Fernand Sastre, Rosieres Pres Troyes, France

[3] Univ Paris Saclay, ENS Paris Saclay, CNRS, LMT Lab Mecan & Technol, Gif Sur Yvette, France

[4] PSL Univ, Ctr Mat Sci MAT UMR 7633, MinesParis, CNRS, Evry, France

[5] Univ Technol Troyes, Life Assessment Struct Mat Mech & Integrated Syst, Troyes, France

来源：

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2023年 / 880卷

关键词：

17-4PH; Additive manufacturing; Heat treatment; Porosities; Strain mapping; Gold nanoparticles; STRAIN-RATE; BEHAVIOR; FATIGUE;

D O I：

10.1016/j.msea.2023.145371

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

This study focuses on the influence of porosities present in the stainless steel 17-4 PH made by material extrusion additive manufacturing (MEAM) process. A comparison is made at the sub-micron scale between an as-fabricated sample and a H900 post-fabrication heat treatment sample. To achieve such observations, gold nanoparticles (NPs) are used as markers in order to capture the evolution of the material behavior during an in-situ mechanical tensile test under a scanning electron microscope. The obtained strain maps allow to evidence strain concentrations and their evolutions regarding the microstructure and the applied post-treatment. The heat-treated sample reveals a change in size and number of porosities. The displacements of NPs during the test highlight the quantitative evolution of the crack initiations and the porosities growth, exposing a more homogenized strain evolution for the H900 sample compared to the as-fabricated one.

引用

页数：12

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