熱処理および表面改質処理を施した生体用Ti-12Cr合金の力学的特性変化

• 丹羽 謙太郎

  名城大学大学院理工学部工学研究科

• 赤堀 俊和

  名城大学理工学部

• 新家 光雄

  名城大学理工学部

• 服部 友一

  名城大学理工学部

• 仲井 正昭

  近畿大学理工学部

書誌事項

タイトル別名

• Change in Mechanical Properties of Biomechanical Ti-12Cr Subjected to Heat Treatment and Surface Modification Processing
• ネツ ショリ オヨビ ヒョウメン カイシツ ショリ オ ホドコシタ セイタイヨウ Ti-12Cr ゴウキン ノ リキガクテキ トクセイ ヘンカ

抄録

 In recent years, metallic biomaterial applications have demanded a relatively low elastic modulus of around 30 GPa that is nearly equal to that of bone. However, in the case of spinal fixture applications, metallic materials with a relatively high Young's modulus are required to suppress spring -back by elastic and plastic deformation during implantation. Therefore, Young's modulus control by stress-induced transformation in a newly developed biomedical β-type Ti-12Cr alloy, has been proposed by the present authors. However, the relationship between the microstructure and mechanical properties of Ti-12Cr has not been fully investigated up till now.<br>  Therefore, changes in the mechanical properties of Ti-12Cr were investigated through heat treatment and the fine particle bombarding process (FPB), which is a surface modification process used in this study. Peak aging of Ti-12Cr heated at 673 K showed for around 2.4 ks.<br>  The Vickers hardness of Ti-12Cr in the peak aging condition (PA) at 673 K was around 90% (HV 524) higher than that (HV 294) in the solutionized condition (ST). Meanwhile, both the 0.2% proof stress and tensile strength of Ti-12Cr in the PA at 673 K were also around 50% higher those in the ST. However, the ductility of Ti-12Cr in the PA at each temperature reduced significantly. Therefore, a solo-solution treatment was judged to be the optimal heat treatment for Ti-12Cr with an excellent combination of strength and ductility. The Vickers hardness and Young's modulus of as-solutionized Ti-12Cr subjected to FPB increased by around 40% and 70%, respectively, at the very edge of the specimen surface, as compared to those of the unprocessed sample. Furthermore, the fatigue strength of Ti-12Cr subjected to FPB increased by around 70 MPa. The bone contact ratio of Ti-12Cr rose slightly with an increase in the implantation period from 24 to 52 weeks.<br>

収録刊行物

• 日本金属学会誌

  日本金属学会誌 80 (12), 764-771, 2016

  公益社団法人 日本金属学会

キーワード

• metallic biomaterial
• stress-induced phase
• mechanical strength
• surface modification
• biocompatibility

詳細情報

• CRID: 1390001206482015744
• NII論文ID: 130005284306
• NII書誌ID: AN00187860
• DOI: 10.2320/jinstmet.j2016036
• ISSN: 18806880
• ISSN: 24337501
• ISSN: 00214876
• NDL書誌ID: 027773218
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I027773218
• Web Site: https://www.jstage.jst.go.jp/article/jinstmet/80/12/80_J2016036/_pdf
• 本文言語コード: ja
• データソース種別:
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