热等静压（HPT）及累积热等静压对新型Ti18Zr15Nb合金组织形成和显微硬度的影响。

Effect of HPT and accumulative HPT on structure formation and microhardness of the novel Ti18Zr15Nb alloy.

作者信息

Gunderov D, Prokoshkin S, Churakova A, Sheremetyev V, Ramazanov I

机构信息

Institute of Molecule and Crystal Physics, Ufa Federal Research Center RAS, Ufa, Russia.

Ufa State Aviation Technical University, Ufa, Russia.

出版信息

Mater Lett. 2021 Jan 15;283:128819. doi: 10.1016/j.matlet.2020.128819. Epub 2020 Oct 13.

DOI:10.1016/j.matlet.2020.128819

PMID:33071398

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC7553141/

Abstract

Effect of HPT and accumulative HPT on the Ti18Zr15Nb biomedical alloy has been studied. According to the XRD and TEM data, the phase is a main phase in the alloy both in the initial state and after processing by HPT and accumulative HPT. The -phase X-ray line width after HPT processing, and especially after ACC HPT processing has drastically increased as a result of an increase in defect concentration and grain refinement. According to TEM, the grains after HPT processing for n = 10 revolutions are refined in some regions down to 10-30 nm. As a result of HPT processing, the alloy's microhardness has noticeably increased, which indicates an increase in strength and yield stress together with the preservation of the -state.

摘要

研究了高压扭转（HPT）及累积高压扭转对Ti18Zr15Nb生物医学合金的影响。根据X射线衍射（XRD）和透射电子显微镜（TEM）数据，该相在合金的初始状态以及经过HPT和累积HPT处理后均为主要相。由于缺陷浓度增加和晶粒细化，HPT处理后，尤其是累积HPT处理后的β相X射线线宽大幅增加。根据TEM结果，在n = 10转的HPT处理后，某些区域的晶粒细化至10 - 30纳米。HPT处理后，合金的显微硬度显著增加，这表明强度和屈服应力增加，同时保留了β态。