Abstract：
:Grit blasting is used as a cost-effective method to increase the surface roughness of metallic biomaterials, as Ti6Al4V and 316 LVM, to enhance the osteointegration, fixation and stability of implants. Samples of these two alloys were blasted by using alumina and zirconia particles, yielding rough (up to Ra~8μm) and nearly smooth (up to Ra~1μm) surfaces, respectively. In this work, we investigate the sub-surface induced microstructural effects and its correlation with the mechanical properties, with special emphasis in the fatigue behavior. Blasting with zirconia particles increases the fatigue resistance whereas the opposite effect is observed using alumina ones. As in a conventional shot penning process, the use of rounded zirconia particles for blasting led to the development of residual compressive stresses at the surface layer, without zones of stress concentrators. Alumina particles are harder and have an angular shape, which confers a higher capability to abrade the surface, but also a high rate of breaking down on impact. The higher roughness and the presence of a high amount of embedded alumina particles make the blasted alloy prone to crack nucleation. Interestingly, the beneficial or detrimental role of blasting is more intense for the Ti6Al4V alloy than for the 316 steel. It is proposed that this behavior is related to their different strain hardening exponents and the higher mass fraction of particles contaminating the surface. The low value of this exponent for the Ti6Al4V alloy justifies the expected low sub-surface hardening during the severe plastic deformation, enhancing its capability to soft during cyclic loading.
journal_name
J Mech Behav Biomed Materauthors
Barriuso S,Chao J,Jiménez JA,García S,González-Carrasco JLdoi
10.1016/j.jmbbm.2013.10.013subject
Has Abstractpub_date
2014-02-01 00:00:00pages
30-40eissn
1751-6161issn
1878-0180pii
S1751-6161(13)00340-8journal_volume
30pub_type
杂志文章abstract：:Laser surface melting (LSM) of Ti6Al4V alloy was carried out with an aim to improve properties such as microstructure and wear for implant applications. The alloy substrate was melted at 250W and 400W at a scan velocity of 5mm/s, with input energy of 42J/mm(2) and 68J/mm(2), respectively. The results showed that equia...
journal_title：Journal of the mechanical behavior of biomedical materials
pub_type： 杂志文章
doi：10.1016/j.jmbbm.2013.12.001
更新日期：2014-04-01 00:00:00
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journal_title：Journal of the mechanical behavior of biomedical materials
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journal_title：Journal of the mechanical behavior of biomedical materials
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journal_title：Journal of the mechanical behavior of biomedical materials
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journal_title：Journal of the mechanical behavior of biomedical materials
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journal_title：Journal of the mechanical behavior of biomedical materials
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journal_title：Journal of the mechanical behavior of biomedical materials
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pub_type： 杂志文章
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journal_title：Journal of the mechanical behavior of biomedical materials
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journal_title：Journal of the mechanical behavior of biomedical materials
pub_type： 杂志文章
doi：10.1016/j.jmbbm.2007.08.001
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journal_title：Journal of the mechanical behavior of biomedical materials
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doi：
更新日期：2014-07-01 00:00:00
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journal_title：Journal of the mechanical behavior of biomedical materials
pub_type： 杂志文章
doi：10.1016/j.jmbbm.2017.07.041
更新日期：2017-11-01 00:00:00
abstract：:Orthopedic interfaces such as the tendon-bone junction (TBJ) present unique challenges for biomaterials development. Here we describe a multi-compartment collagen-GAG scaffold fabricated via lyophilization that contains discrete mineralized (CGCaP) and non-mineralized (CG) regions joined by a continuous interface. Mod...
journal_title：Journal of the mechanical behavior of biomedical materials
pub_type： 杂志文章
doi：10.1016/j.jmbbm.2013.07.016
更新日期：2013-12-01 00:00:00
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journal_title：Journal of the mechanical behavior of biomedical materials
pub_type： 杂志文章
doi：10.1016/j.jmbbm.2019.02.022
更新日期：2019-06-01 00:00:00
abstract：:The surface of commercially pure Ti (cp-Ti) substrate was grit-blasted with Al(2)O(3) powders and then wet-blasted with HAp/Ti mixed powders at room temperature. Then plasma spraying with Ti powders or HAp/Ti mixed powders on the blasted surface was carried out to form a bond coat layer, denoted as T50 and T100 bond c...
journal_title：Journal of the mechanical behavior of biomedical materials
pub_type： 杂志文章
doi：10.1016/j.jmbbm.2008.11.001
更新日期：2009-10-01 00:00:00
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journal_title：Journal of the mechanical behavior of biomedical materials
pub_type： 杂志文章
doi：10.1016/j.jmbbm.2013.03.001
更新日期：2013-05-01 00:00:00
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journal_title：Journal of the mechanical behavior of biomedical materials
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journal_title：Journal of the mechanical behavior of biomedical materials
pub_type： 杂志文章
doi：10.1016/j.jmbbm.2012.07.014
更新日期：2012-12-01 00:00:00
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journal_title：Journal of the mechanical behavior of biomedical materials
pub_type： 杂志文章
doi：10.1016/j.jmbbm.2014.01.007
更新日期：2014-06-01 00:00:00
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journal_title：Journal of the mechanical behavior of biomedical materials
pub_type： 杂志文章
doi：10.1016/j.jmbbm.2010.09.006
更新日期：2011-01-01 00:00:00
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journal_title：Journal of the mechanical behavior of biomedical materials
pub_type： 杂志文章
doi：10.1016/j.jmbbm.2014.06.012
更新日期：2014-10-01 00:00:00
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journal_title：Journal of the mechanical behavior of biomedical materials
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journal_title：Journal of the mechanical behavior of biomedical materials
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journal_title：Journal of the mechanical behavior of biomedical materials
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journal_title：Journal of the mechanical behavior of biomedical materials
pub_type： 杂志文章
doi：10.1016/j.jmbbm.2018.08.022
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journal_title：Journal of the mechanical behavior of biomedical materials
pub_type： 杂志文章
doi：10.1016/j.jmbbm.2015.03.004
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