High Throughput Assays for Additively Manufactured Ti-Ni Alloys Based on Compositional Gradients and Spherical Indentation

Gong, Xinyi; Mohan, Soumya; Mendoza, Michael Y.; Gray, A.; Collins, Peter C.; Kalidindi, Surya R.

doi:10.1007/s40192-017-0100-9

Cited by 19 publications

(5 citation statements)

References 63 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…As demonstrated in previous studies [ 37 , 39 , 82 , 105 ], the averaged values from the multiple indentations summarized in Figure 7 provide reliable measures of the bulk properties measured in standardized tests. The estimated Young’s moduli did not show clearly identified trends between the different material conditions explored in this study, and fell in the range of 97–130 GPa.…”

Section: Discussionsupporting

confidence: 65%

“…In recent work [ 37 ], it was demonstrated that it is possible to prototype compositionally graded AM samples and characterize their mechanical properties using the stress–strain analysis protocols based on spherical indentation. This strategy appears to exhibit tremendous potential for the high-throughput extraction of the relationships between the processing conditions, microstructural features and properties [ 38 , 39 ].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Evaluation of Ti–Mn Alloys for Additive Manufacturing Using High-Throughput Experimental Assays and Gaussian Process Regression

et al. 2020

View full text Add to dashboard Cite

Compositionally graded cylinders of Ti–Mn alloys were produced using the Laser Engineered Net Shaping (LENS™) technique, with Mn content varying from 0 to 12 wt.% along the cylinder axis. The cylinders were subjected to different post-build heat treatments to produce a large sample library of a–b microstructures. The microstructures in the sample library were studied using back-scattered electron (BSE) imaging in a scanning electron microscope (SEM), and their mechanical properties were evaluated using spherical indentation stress–strain protocols. These protocols revealed that the microstructures exhibited features with averaged chord lengths in the range of 0.17–1.78 mm, and beta content in the range of 20–83 vol.%. The estimated values of the Young’s moduli and tensile yield strengths from spherical indentation were found to vary in the ranges of 97–130 GPa and 828–1864 MPa, respectively. The combined use of the LENS technique along with the spherical indentation protocols was found to facilitate the rapid exploration of material and process spaces. Analyses of the correlations between the process conditions, several key microstructural features, and the measured material properties were performed via Gaussian process regression (GPR). These data-driven statistical models provided valuable insights into the underlying correlations between these variables.

show abstract

Section: Discussionsupporting

confidence: 65%

Section: Introductionmentioning

confidence: 99%

Evaluation of Ti–Mn Alloys for Additive Manufacturing Using High-Throughput Experimental Assays and Gaussian Process Regression

et al. 2020

View full text Add to dashboard Cite

show abstract

“…The deviation from a nominally equiaxed alpha particle ( Figure 5(c)) present in the parent material to the deformed particles present in the TMAZ (Figure 5(b)) can be quantified by measuring the eccentricity of the grains which ranges from 0 for a perfect circle to 1 for a straight line, [22] which was automatically measured using a software package (MIPARä). [23] The undeformed a particles shown in Figure 5(c) had an eccentricity value of 0.49, while the plastically deformed alpha particles had an eccentricity value of 0.97. These quantitative measurements of eccentricity can be easily correlated with the elastic strain by considering these particles to be oblates .…”

Section: Resultsmentioning

confidence: 97%

Microstructure Characterization and Mechanical Properties in Individual Zones of Linear Friction Welded Ti-6Al-4V Alloy

Mendoza

Quintana

Collins

2020

Metall Mater Trans A

View full text Add to dashboard Cite

Linear friction welding (LFW) offers a new approach to manufacture aerospace components while improving the buy-to-fly ratio. However, the fundamental knowledge associated with the LFW process, including the attendant microstructural evolution and corresponding mechanical behavior is still rather limited. In this research effort, subscale tensile coupons were prepared and tested to determine the properties of each discrete zone of the linear friction welded specimen, namely the welded zone, thermomechanically affected zone, and parent material. The results show that the yield strength of the welded zone is 20 pct higher than the parent material and the thermomechanically affected zone is 13 pct higher than the parent material. Materials characterization, including optical microscopy, scanning electron microscopy, electron backscattered diffraction-based orientation microscopy and transmission electron microscopy, was conducted to develop an understanding of the microstructure-property relationships. The highly refined nature of the microstructure makes final interpretations challenging, but the evidence suggests that the mechanical behavior is dominated by phenomenon that operate at the 1 to 50 nm length scale, including strain hardening and highly refined features that hinder slip.

show abstract

“…AM offers the research advantage of produce graded compositions within the same sample. This is achieved by using elemental powder blends in a system with multiple hoppers (Collins [2003] and Gong et al [2017]).…”

Section: Additive Manufacturingmentioning

confidence: 99%

Additive Manufacturing of Ti-Alloys for Aerospace, Naval and Offshore Applications

Mendoza¹,

Delgado-Morales²,

Palma³

2022

Fundamental Concepts and Models for the Direct Problem

View full text Add to dashboard Cite

Titanium alloys are well-known by their excellent corrosion resistance and high strength-to-weight ratio. The aerospace industry has been taking advantage of those properties and enhancing them with novel manufacturing techniques such as Additive Manufacturing (AM). However, the naval and offshore industry has very limited use of those benefits. This is mainly due to technical limitations such as small-scale parts and low deposition rates of the most common AM processes. This work presents a review of the state-of-the-art in AM and its applications, in which relevant publications related to this important area of investigation are considered. Initially, titanium is described as the main alloy. The Laser Engineered Net-Shape (LENS TM ), Electron Beam Additive Manufacturing (EBAM @ ) and Wire Arc Additive Manufacturing (WAAM) processes are presented. Given that WAAM offers potential solutions for size and deposition rates with design challenges and new materials for component fabrication, at the end of the chapter, applications from the naval and offshore areas where this method is used are shown.

show abstract

High Throughput Assays for Additively Manufactured Ti-Ni Alloys Based on Compositional Gradients and Spherical Indentation

Cited by 19 publications

References 63 publications

Evaluation of Ti–Mn Alloys for Additive Manufacturing Using High-Throughput Experimental Assays and Gaussian Process Regression

Evaluation of Ti–Mn Alloys for Additive Manufacturing Using High-Throughput Experimental Assays and Gaussian Process Regression

Microstructure Characterization and Mechanical Properties in Individual Zones of Linear Friction Welded Ti-6Al-4V Alloy

Additive Manufacturing of Ti-Alloys for Aerospace, Naval and Offshore Applications

Contact Info

Product

Resources

About