Effect of annealing temperature on microstructure and mechanical response of sputter deposited Ti-Zr-Mo high temperature shape memory alloy thin films

Marupalli, Bharat C.G.; Adhikary, Tapasendra; Sahu, Basudeb; Mitra, Rahul; Aich, Shampa

doi:10.1016/j.apsadv.2021.100137

Cited by 10 publications

(4 citation statements)

References 47 publications

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“…[4,6,7]. The measured alloys are Ti− (16,18,23,24)Nb−3Al [6], Ti−24Nb−(0-4)Al [4], and Ti−22Nb−(4-8)Ta [7] ternary alloys. For completeness, Ti−22Nb [7] and Ti−24Nb [6] binary alloys are also displayed.…”

Section: Resultsmentioning

confidence: 99%

“…Moreover, there was a correlation between Ms and C44, implying that an elastic modulus [4,6] and Ti-Nb-Ta [7] ternary alloys are shown for comparison. Note that the available measured alloy compositions are Ti− (16,18,23,24)Nb−3Al [6] and Ti−24Nb−(1-4)Al [4] for Ti-Nb-Al alloys and Ti−22Nb−(4-8)Ta [7] for Ti−Nb−Ta alloys. For completeness, the M s of Ti−22Nb [7] and Ti−24Nb [4] are also displayed.…”

Section: Discussionmentioning

confidence: 99%

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Alloying Effect on Transformation Strain and Martensitic Transformation Temperature of Ti-Based Alloys from Ab Initio Calculations

Fang,

Xu,

Zhang

et al. 2023

Materials

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The accurate prediction of alloying effects on the martensitic transition temperature (Ms) is still a big challenge. To investigate the composition-dependent lattice deformation strain and the Ms upon the β to α″ phase transition, we calculate the total energies and transformation strains for two selected Ti−Nb−Al and Ti−Nb−Ta ternaries employing a first-principles method. The adopted approach accurately estimates the alloying effect on lattice strain and the Ms by comparing it with the available measurements. The largest elongation and the largest compression due to the lattice strain occur along ±[011]β and ±[100]β, respectively. As compared to the overestimation of the Ms from existing empirical relationships, an improved Ms estimation can be realized using our proposed empirical relation by associating the measured Ms with the energy difference between the β and α″ phases. There is a satisfactory agreement between the predicted and measured Ms, implying that the proposed empirical relation could accurately describe the coupling alloying effect on Ms. Both Al and Ta strongly decrease the Ms, which is in line with the available observations. A correlation between the Ms and elastic modulus, C44, is found, implying that elastic moduli may be regarded as a prefactor of composition-dependent Ms. This work sheds deep light on precisely and directly predicting the Ms of Ti-containing alloys from the first-principles method.

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Section: Resultsmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Alloying Effect on Transformation Strain and Martensitic Transformation Temperature of Ti-Based Alloys from Ab Initio Calculations

Fang,

Xu,

Zhang

et al. 2023

Materials

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“…Strong structural modifications induced by high-intensity ultra-short laser pulses could be modified by a post-processing steps of high temperature annealing (HTA) as recently demonstrated for micro-optical elements laser ablated out of crystalline sapphire Al 2 O 3 [13]. HTA is a commonly used process for changing the surface morphology of different materials [14][15][16][17]. It has been used to make the particle size of high-temperature alloy thin films smaller [14], to create ceramic devices from polymers [17], and to smooth out germanium layers on silicon substrates [15] and terraces of chemically etched SrTiO 3 [16].…”

Section: Introduction: High Intensity > Tw/cm 2 Crystal Processingmentioning

confidence: 99%

“…HTA is a commonly used process for changing the surface morphology of different materials [14][15][16][17]. It has been used to make the particle size of high-temperature alloy thin films smaller [14], to create ceramic devices from polymers [17], and to smooth out germanium layers on silicon substrates [15] and terraces of chemically etched SrTiO 3 [16]. The roughness evolution of rapidly annealed surfaces is well understood; as the annealing time increases, the roughness decreases linearly [18].…”

Section: Introduction: High Intensity > Tw/cm 2 Crystal Processingmentioning

confidence: 99%

Crystalline Flat Surface Recovered by High-Temperature Annealing after Laser Ablation

Smith

Tang

et al. 2023

Photonics

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Ultra-short laser pulses (1030 nm/230 fs) were used to laser ablate the surface of crystalline sapphire (Al2O3) at high intensity per pulse 20–200 TW/cm2/pulse. Laser-ablated patterns were annealed at a high temperature of 1500 °C. Surface reconstruction took place, removing the ablation debris field at the edges of ablated pits in oxygen flow (O2 flow). Partial reconstruction of ripples was also observed when multi-pulse ablated surfaces were annealed at high temperature in O2 flow. Back-side ablation of a 0.5-mm-thick Al2O3 produced high surface roughness ∼1μm which was reduced to ∼0.2μm by high-temperature annealing at 1500 °C for 2 h in O2. Improvement of surface quality was due to restructuring of the crystalline surface and sublimation, while the defined 3D shape of a micro-lens was not altered after HTA (no thermal morphing).

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Four‐Dimensional (4D) Microprinting

Korrayi,

Jena,

Marupalli

et al. 2024

Additive Manufacturing With Novel Materials

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Effect of annealing temperature on microstructure and mechanical response of sputter deposited Ti-Zr-Mo high temperature shape memory alloy thin films

Cited by 10 publications

References 47 publications

Alloying Effect on Transformation Strain and Martensitic Transformation Temperature of Ti-Based Alloys from Ab Initio Calculations

Alloying Effect on Transformation Strain and Martensitic Transformation Temperature of Ti-Based Alloys from Ab Initio Calculations

Crystalline Flat Surface Recovered by High-Temperature Annealing after Laser Ablation

Four‐Dimensional (4D) Microprinting

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