It becomes important to measure mechanical properties of local area of materials because of downsizing of industrial materials, and the fracture of materials often starts at the nanoscale defects. Therefore, the measurement of hardness of the local area of materials is one of key technologies to develop new materials. Nanoindentation is the depth sensing indentation method and can measure the mechanical properties of nanoscale area of materials. The hardness of materials under the controlled environment like high temperature is a big issue in energy or environment industries. Therefore, it becomes important to measure high temperature mechanical properties of nanoscale area of materials by nanoindentation. However, the shape of indenter may change when an indenter contacts to the material surface at high temperatures, and the nanoindentation at high temperatures may lead to inaccuracy of measurements. Nanoindentation does not measure indented are directly but converts the indentation depth to the indented area by area function. In order to correctly convert the indentation depth to the indented area, it is necessary to derive the area function of indented area at high temperatures. In this report, the area function is proposed that considers the change of indenter shape during repeating contact at heated materials. By using this proposed area function, nanoindentation hardness and the reduced modulus of sapphire were obtained at 303K, 473K, 673K, 873K and 1073K successfully. The nanoindentation can be used at high temperatures, if this proposed area function is used.
Published in | International Journal of Materials Science and Applications (Volume 8, Issue 6) |
DOI | 10.11648/j.ijmsa.20190806.11 |
Page(s) | 98-102 |
Creative Commons |
This is an Open Access article, distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution and reproduction in any medium or format, provided the original work is properly cited. |
Copyright |
Copyright © The Author(s), 2019. Published by Science Publishing Group |
Nanoindentation, Area Function, Hardness, Elastic Modulus, Sapphire, High Temperature
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APA Style
Toshiro Okawa, Ian Thomas Clark, Katsuhiko Tashiro, Hideo Honma, Kazuhiro Yoshihara, et al. (2019). Area Function for Nanoindentation at High Temperatures. International Journal of Materials Science and Applications, 8(6), 98-102. https://doi.org/10.11648/j.ijmsa.20190806.11
ACS Style
Toshiro Okawa; Ian Thomas Clark; Katsuhiko Tashiro; Hideo Honma; Kazuhiro Yoshihara, et al. Area Function for Nanoindentation at High Temperatures. Int. J. Mater. Sci. Appl. 2019, 8(6), 98-102. doi: 10.11648/j.ijmsa.20190806.11
AMA Style
Toshiro Okawa, Ian Thomas Clark, Katsuhiko Tashiro, Hideo Honma, Kazuhiro Yoshihara, et al. Area Function for Nanoindentation at High Temperatures. Int J Mater Sci Appl. 2019;8(6):98-102. doi: 10.11648/j.ijmsa.20190806.11
@article{10.11648/j.ijmsa.20190806.11, author = {Toshiro Okawa and Ian Thomas Clark and Katsuhiko Tashiro and Hideo Honma and Kazuhiro Yoshihara and Osamu Takai}, title = {Area Function for Nanoindentation at High Temperatures}, journal = {International Journal of Materials Science and Applications}, volume = {8}, number = {6}, pages = {98-102}, doi = {10.11648/j.ijmsa.20190806.11}, url = {https://doi.org/10.11648/j.ijmsa.20190806.11}, eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.ijmsa.20190806.11}, abstract = {It becomes important to measure mechanical properties of local area of materials because of downsizing of industrial materials, and the fracture of materials often starts at the nanoscale defects. Therefore, the measurement of hardness of the local area of materials is one of key technologies to develop new materials. Nanoindentation is the depth sensing indentation method and can measure the mechanical properties of nanoscale area of materials. The hardness of materials under the controlled environment like high temperature is a big issue in energy or environment industries. Therefore, it becomes important to measure high temperature mechanical properties of nanoscale area of materials by nanoindentation. However, the shape of indenter may change when an indenter contacts to the material surface at high temperatures, and the nanoindentation at high temperatures may lead to inaccuracy of measurements. Nanoindentation does not measure indented are directly but converts the indentation depth to the indented area by area function. In order to correctly convert the indentation depth to the indented area, it is necessary to derive the area function of indented area at high temperatures. In this report, the area function is proposed that considers the change of indenter shape during repeating contact at heated materials. By using this proposed area function, nanoindentation hardness and the reduced modulus of sapphire were obtained at 303K, 473K, 673K, 873K and 1073K successfully. The nanoindentation can be used at high temperatures, if this proposed area function is used.}, year = {2019} }
TY - JOUR T1 - Area Function for Nanoindentation at High Temperatures AU - Toshiro Okawa AU - Ian Thomas Clark AU - Katsuhiko Tashiro AU - Hideo Honma AU - Kazuhiro Yoshihara AU - Osamu Takai Y1 - 2019/10/31 PY - 2019 N1 - https://doi.org/10.11648/j.ijmsa.20190806.11 DO - 10.11648/j.ijmsa.20190806.11 T2 - International Journal of Materials Science and Applications JF - International Journal of Materials Science and Applications JO - International Journal of Materials Science and Applications SP - 98 EP - 102 PB - Science Publishing Group SN - 2327-2643 UR - https://doi.org/10.11648/j.ijmsa.20190806.11 AB - It becomes important to measure mechanical properties of local area of materials because of downsizing of industrial materials, and the fracture of materials often starts at the nanoscale defects. Therefore, the measurement of hardness of the local area of materials is one of key technologies to develop new materials. Nanoindentation is the depth sensing indentation method and can measure the mechanical properties of nanoscale area of materials. The hardness of materials under the controlled environment like high temperature is a big issue in energy or environment industries. Therefore, it becomes important to measure high temperature mechanical properties of nanoscale area of materials by nanoindentation. However, the shape of indenter may change when an indenter contacts to the material surface at high temperatures, and the nanoindentation at high temperatures may lead to inaccuracy of measurements. Nanoindentation does not measure indented are directly but converts the indentation depth to the indented area by area function. In order to correctly convert the indentation depth to the indented area, it is necessary to derive the area function of indented area at high temperatures. In this report, the area function is proposed that considers the change of indenter shape during repeating contact at heated materials. By using this proposed area function, nanoindentation hardness and the reduced modulus of sapphire were obtained at 303K, 473K, 673K, 873K and 1073K successfully. The nanoindentation can be used at high temperatures, if this proposed area function is used. VL - 8 IS - 6 ER -