Sintering anisotropy of binder jetted 316L stainless steel: part I – sintering anisotropy

IF 1.9 4区材料科学 Q2 METALLURGY & METALLURGICAL ENGINEERING

Powder Metallurgy Pub Date : 2021-12-25 DOI:10.1080/00325899.2021.2020485

Alberto Cabo Rios, E. Hryha, E. Olevsky, P. Harlin

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引用次数: 11

Abstract

ABSTRACT In Binder Jetting (BJ) Additive Manufacturing (AM), green components are usually subjected to sintering process to reach required properties. Owing to the inherent low green density, binder jetted (BJ) parts undergo shrinkages up to 20%. In addition, anisotropic dimensional evolution during sintering is characteristic for BJ, generally caused by the specifics of the arrangement of particles during the printing process. In this study, the multi-axial dimensional evolution of 316L stainless steel cubic samples (10 × 10 × 10 mm3), manufactured using BJ, was characterised by dilatometry experiments. Dilatometry tests were conducted up to sintering temperatures of 1300°C and 1370°C, with a heating rate of 10°C/min and 5°C/min, respectively. Dilatometry results and final dimension measurements showed anisotropic shrinkage behaviour during sintering with about 15% larger shrinkage along the building direction. Shrinkages along the other two orthogonal directions were relatively similar, but a slightly larger final shrinkage along the printhead movement direction was observed. Relative density of 85.0% and 96.4% was obtained after sintering tests at 1300°C and 1370°C, respectively.

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粘结剂喷射316L不锈钢的烧结各向异性:第一部分-烧结各向异性

摘要在粘结剂喷射增材制造（AM）中，生坯部件通常要经过烧结工艺才能达到所需的性能。由于固有的低生坯密度，粘结剂喷射（BJ）零件的收缩率高达20%。此外，烧结过程中的各向异性尺寸演变是BJ的特征，通常是由印刷过程中颗粒排列的细节引起的。在本研究中，316L不锈钢立方体样品（10 × 10 × 10 mm3），使用BJ制造，通过膨胀测量实验进行表征。在1300°C和1370°C的烧结温度下，分别以10°C/min和5°C/min的加热速率进行膨胀试验。膨胀测试结果和最终尺寸测量显示，烧结过程中的收缩行为各向异性，沿建筑方向的收缩率高出约15%。沿其他两个正交方向的收缩相对相似，但观察到沿打印头移动方向的最终收缩稍大。在1300°C和1370°C下进行烧结试验后，获得的相对密度分别为85.0%和96.4%。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Powder Metallurgy 工程技术-冶金工程

CiteScore

2.90

自引率

7.10%

发文量

审稿时长

3 months

期刊介绍： Powder Metallurgy is an international journal publishing peer-reviewed original research on the science and practice of powder metallurgy and particulate technology. Coverage includes metallic particulate materials, PM tool materials, hard materials, composites, and novel powder based materials.