Effect of Process Parameters on Density and Compressive Properties of Ti5553 Alloy Block Prepared by SLM

doi:10.11901/1005.3093.2024.398

Chinese Journal of Materials Research

2025, Vol. 39

Issue (8): 583-591 DOI: 10.11901/1005.3093.2024.398

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Effect of Process Parameters on Density and Compressive Properties of Ti5553 Alloy Block Prepared by SLM

WANG Mingyu¹^,³, LI Shujun²(

), HE Zhenghua¹^,³(

), TANG Mingde¹^,³, ZHANG Siqian¹^,³, ZHANG Haoyu¹^,³, ZHOU Ge¹^,³, CHEN Lijia¹^,³

^1.School of Materials Science and Engineering, Shenyang University of Technology, Shenyang 110870, China
^2.Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China
^3.Shenyang Key Laboratory of Advanced Structural Materials and Applications, Shenyang University of Technology, Shenyang 110870, China

Cite this article:

WANG Mingyu, LI Shujun, HE Zhenghua, TANG Mingde, ZHANG Siqian, ZHANG Haoyu, ZHOU Ge, CHEN Lijia. Effect of Process Parameters on Density and Compressive Properties of Ti5553 Alloy Block Prepared by SLM. Chinese Journal of Materials Research, 2025, 39(8): 583-591.

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Abstract

Bulk Ti-5Al-5Mo-5V-3Cr (Ti5553) alloy was prepared by selective laser melting (SLM) technique, then the effect of laser power and scanning speed on the relative density, microstructural defects, and mechanical properties of the prepared alloy was assessed. The results indicate that as laser energy density increases, defects in the Ti5553 alloy decrease and relative density is improved. By laser power within the range 110-120 W and scanning speed 300-500 mm/s, the relative density of the alloy exceeded 99.99%. The main defects in the alloy include irregularly shaped lack-of-fusion defects and regular keyholes. Lack-of-fusion defects mainly existed in the alloys prepared by laser of lower energy densities (~111 J/mm³) however which decrease with the increasing laser energy density. Excessive energy density (~167 J/mm³) results in the formation of keyholes of a small volume fraction with regular shape, and good sphericity. Compression test results show that alloys of relative density above 99% exhibit high yield strength, reaching up to 864 MPa. These findings may provide a reference for the research and development in the application selective laser melting for manufacturing workpieces of Ti5553 alloy.

Key words: metallic materials Ti5553 SLM density compression performance

Received: 27 September 2024

ZTFLH:

TG146.23

Fund: National Natural Science Foundation of China(U2241245);National Natural Science Foundation of China(52321001);Aeronautical Science Foundation of China(2022Z053092001)

Corresponding Authors: LI Shujun, Tel: (024)83978841, E-mail: shjli@imr.ac.cn;
HE Zhenghua, Tel: (024)25496301, E-mail: hezhh@sut.edu.cn

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	WANG Mingyu
	LI Shujun
	HE Zhenghua
	TANG Mingde
	ZHANG Siqian
	ZHANG Haoyu
	ZHOU Ge
	CHEN Lijia

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https://www.cjmr.org/EN/10.11901/1005.3093.2024.398 OR https://www.cjmr.org/EN/Y2025/V39/I8/583

Fig.1 SLM scanning strategies. The layer rotation angle is 67°

Table 1 The numbering and process parameters for sample selection

Fig.2 SEM images of Ti5553 alloy powder morphology (a) 100×, (b) 500×

Fig.3 Particle size (a) and sphericity distribution chart (b) of Ti5553 alloy powder

Fig.4 Measurement of porosity using the archimedes method (a) and the relationship between relative density and energy density (b)

Fig.5 Optical microscopy (OM) images of defect morphologies by different laser powers and scanning speeds

Fig.6 CT image of defects in sample A1 with 70 W laser power and 400 mm/s scanning speed, with a relative density of 98.71% (a), CT image of defects in sample A2 with 70 W laser power and 600 mm/s scanning speed, with a relative density of 96.32% (b), CT image of defects in sample A3 with 70 W laser power and 800 mm/s scanning speed, with a relative density of 91.79% (c) and the scale of defect sizes in the CT images (d)

Table 2 Maximum Feret diameter of defects in CT samples

Fig.7 CT image of defects in sample B1 with 100 W laser power and 400 mm/s scanning speed, with a relative density of 99.93% (a), CT image of defects in sample B2 with 100 W laser power and 600 mm/s scanning speed, with a relative density of 99.62% (b), CT image of defects in sample B3 with 100 W laser power and 800 mm/s scanning speed, with a relative density of 98.83% (c) and the scale of defect sizes in the CT images (d)

Fig.8 CT image of defects in sample C1 with 120 W laser power and 400 mm/s scanning speed, with a relative density of 99.99% (a), CT image of defects in sample C2 with 120 W laser power and 600 mm/s scanning speed, with a relative density of 99.92% (b), CT image of defects in sample C3 with 120 W laser power and 800 mm/s scanning speed, with a relative density of 99.62% (c) and the scale of defect sizes in the CT images (d)

Table 3 Different methods for measuring relative density values and errors

Fig.9 Engineering stress-strain curve of A1 (a), engineering stress-strain curve of A2 (b), engineering stress-strain curve of A3 (c), engineering stress-strain curve of B1 (d), engineering stress-strain curve of B2 (e), engineering stress-strain curve of B3 (f), engineering stress-strain curve of C1 (g), engineering stress-strain curve of C2 (h) and engineering stress-strain curve of C3 (i)

Table 4 Energy density and yield strength of Ti-5553 alloy with different parameters

Fig.10 Yield strength of Ti5553 under different process parameters (a) and relationship between yield strength and energy density (b)

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