Nano-mechanical Behavior of H13 Tool Steel Fabricated by a Selective Laser Melting Method

Nguyen, Van Luong; Kim, Eun-ah; Yun, Jaecheol; Choe, Jungho; Yang, Dong‐Yeol; Lee, Hak-sung; Lee, Chang-Woo; Yu, Juan

doi:10.1007/s11661-018-5024-2

Cited by 14 publications

(5 citation statements)

References 29 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The relationship between indentation nanohardness and strain rate could be expressed by Equation (1):

where H is the nanohardness (GPa), C is the material constant,

is the strain rate (s −1 ), and m is the strain rate sensitivity exponent [ 43 ]. Therefore, the strain-rate sensitivity exponent can be determined by the slope of an lnH vs. ln

plot.…”

Section: Resultsmentioning

confidence: 99%

“…The value of m (0.053 ± 0.014 and 0.047 ± 0.009) in this study does not exceed 0.1, which is similar to that of the most known materials. Yu et al [ 43 ] determined the strain-rate sensitivity exponent of H13 tool steel to be 0.022 using nanoindentation. Jun et al [ 27 ] characterized the strain-rate sensitivity exponent of Ti6246 alloys to be 0.005–0.039 via nanoindentation test.…”

Section: Resultsmentioning

confidence: 99%

“…where H is the nanohardness (GPa), C is the material constant, . ε is the strain rate (s −1 ), and m is the strain rate sensitivity exponent [43]. Therefore, the strain-rate sensitivity exponent can be determined by the slope of an lnH vs. ln ε has a high correlation coefficient, R 2 = 0.83, and R 2 = 0.9 for sample A and sample B, respectively.…”

Section: Strain-rate Sensitivitymentioning

confidence: 99%

See 2 more Smart Citations

Nano-Mechanical Properties and Creep Behavior of Ti6Al4V Fabricated by Powder Bed Fusion Electron Beam Additive Manufacturing

et al. 2021

View full text Add to dashboard Cite

Effects of scanning strategy during powder bed fusion electron beam additive manufacturing (PBF-EB AM) on microstructure, nano-mechanical properties, and creep behavior of Ti6Al4V alloys were compared. Results show that PBF-EB AM Ti6Al4V alloy with linear scanning without rotation strategy was composed of 96.9% α-Ti and 2.7% β-Ti, and has a nanoindentation range of 4.11–6.31 GPa with the strain rate ranging from 0.001 to 1 s−1, and possesses a strain-rate sensitivity exponent of 0.053 ± 0.014. While PBF-EB AM Ti6Al4V alloy with linear and 90° rotate scanning strategy was composed of 98.1% α-Ti and 1.9% β-Ti and has a nanoindentation range of 3.98–5.52 GPa with the strain rate ranging from 0.001 to 1 s−1, and possesses a strain-rate sensitivity exponent of 0.047 ± 0.009. The nanohardness increased with increasing strain rate, and creep displacement increased with the increasing maximum holding loads. The creep behavior was mainly dominated by dislocation motion during deformation induced by the indenter. The PBF-EB AM Ti6Al4V alloy with only the linear scanning strategy has a higher nanohardness and better creep resistance properties than the alloy with linear scanning and 90° rotation strategy. These results could contribute to understanding the creep behavior of Ti6Al4V alloy and are significant for PBF-EB AM of Ti6Al4V and other alloys.

show abstract

“…The relationship between indentation nanohardness and strain rate could be expressed by Equation (1):

where H is the nanohardness (GPa), C is the material constant,

is the strain rate (s −1 ), and m is the strain rate sensitivity exponent [ 43 ]. Therefore, the strain-rate sensitivity exponent can be determined by the slope of an lnH vs. ln

plot.…”

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Strain-rate Sensitivitymentioning

confidence: 99%

See 1 more Smart Citation

Nano-Mechanical Properties and Creep Behavior of Ti6Al4V Fabricated by Powder Bed Fusion Electron Beam Additive Manufacturing

et al. 2021

View full text Add to dashboard Cite

show abstract

“…The hardness and elastic modulus of H13 steel are shown in the table of figure 4, the values are 9.25 GPa and 207.16 GPa, respectively. It can be seen that H13 steel selected in this paper has high hardness [27,28].…”

Section: Indentation Testsmentioning

confidence: 88%

Wear performance and mechanisms of H13 steels sliding against different Rock types

Tian¹,

Hu²,

Liu³

et al. 2020

Surf. Topogr.: Metrol. Prop.

View full text Add to dashboard Cite

Disc cutters are the main working tools of full-face hard rock tunnel boring machine (TBM). They are in direct contact with rocks, sustaining enormous loads and vibrations in practical constructions. Therefore, The wear of the disc cutters is very severe and would cause huge economic costs. In this study, the abrasive wear performance of disc cutters' material (H13 steel) was analyzed by pin-on-disc wear tests in contact with three types of rocks (sandstone, granite and gneiss) under different loads (100 N and 200 N). The friction coefficient was recorded during the tests. The wear rate of H13 steel and maximum wear depth of rocks were calculated and measured. The worn surfaces of H13 steel were observed. Results showed that the friction coefficient, the wear rate of H13 steel and the maximum wear depth of rocks under the load of 100 N was lower than those of 200 N. The main wear mechanism of H13 steel in contact with sandstone was three-body wear, while the main wear mechanism of H13 steel in contact with high-strength rocks (granite and gneiss) was abrasive wear. The study of wear performance and mechanisms of H13 steels sliding against different rock types would provide theoretical supports for the construction of TBM under various geological conditions.

show abstract

“…More importantly, the elongation of as-SLMed H13 is normally lower than that obtained by conventional methods [ 12 , 13 , 14 ]. It was addressed that the high fluctuation of mechanical properties are mainly a response for the different contents of residual austenite [ 15 , 16 ], high residual stresses [ 17 , 18 , 19 ] and defects [ 20 , 21 ].…”

Section: Introductionmentioning

confidence: 99%

Microstructures and Mechanical Properties of H13 Tool Steel Fabricated by Selective Laser Melting

et al. 2022

View full text Add to dashboard Cite

H13 stool steel processed by selective laser melting (SLM) suffered from severe brittleness and scatter distribution of mechanical properties. We optimized the mechanical response of as-SLMed H13 by tailoring the optimisation of process parameters and established the correlation between microstructure and mechanical properties in this work. Microstructures were examined using XRD, SEM, EBSD and TEM. The results showed that the microstructures were predominantly featured by cellular structures and columnar grains, which consisted of lath martensite and retained austenite with numerous nanoscale carbides being distributed at and within sub-grain boundaries. The average size of cellular structure was ~500 nm and Cr and Mo element were enriched toward the cell wall of each cellular structure. The as-SLMed H13 offered the yield strength (YS) of 1468 MPa, the ultimate tensile strength (UTS) of 1837 MPa and the fracture strain of 8.48%. The excellent strength-ductility synergy can be attributed to the refined hierarchical microstructures with fine grains, the unique cellular structures and the presence of dislocations. In addition, the enrichment of solute elements along cellular walls and carbides at sub-grain boundaries improve the grain boundary strengthening.

show abstract

Nano-mechanical Behavior of H13 Tool Steel Fabricated by a Selective Laser Melting Method

Cited by 14 publications

References 29 publications

Nano-Mechanical Properties and Creep Behavior of Ti6Al4V Fabricated by Powder Bed Fusion Electron Beam Additive Manufacturing

Nano-Mechanical Properties and Creep Behavior of Ti6Al4V Fabricated by Powder Bed Fusion Electron Beam Additive Manufacturing

Wear performance and mechanisms of H13 steels sliding against different Rock types

Microstructures and Mechanical Properties of H13 Tool Steel Fabricated by Selective Laser Melting

Contact Info

Product

Resources

About