Yu Zhang, Jiazhuo Lei, Z. Dan, Hui Chang, Lian Zhou
{"title":"初始气体雾化粉末尺寸配方对SLM化Ti-6Al-4V大块合金组织和钝化特性的组合影响","authors":"Yu Zhang, Jiazhuo Lei, Z. Dan, Hui Chang, Lian Zhou","doi":"10.5755/j02.ms.31220","DOIUrl":null,"url":null,"abstract":"Bulk Ti-6Al-4V alloys have been fabricated by selective laser melting (SLM) in three recipes with different combinations of powder sizes. Combinatorial effects of initial gas-atomized powder sizes on microstructure and corrosion properties of SLM-ed Ti-6Al-4V alloys have been investigated by optical microscopy, X-ray diffraction, electrochemical measurements and surface free energy. The SLM-ed Ti-6Al-4V alloys are composed of acicular α' martensite and α phases. Many pinhole defects and twin boundaries exist in the SLM-ed Ti-6Al-4V alloys. According to electrochemical tests and surface free energy calculation, the SLM-ed Ti-6Al-4V alloys with 0 – 53 μm powders have the most positive corrosion potential, the lowest current density and the smallest surface free energy of 20.89 mJ m2. The passive film of SLM-ed Ti-6Al-4V alloys with 0 – 53 μm powders has superior protection ability due to their large thickness. The carrier concentration of SLM-ed Ti-6Al-4V alloys with 0 – 53 μm powders is the lowest by the Mott-Schottky curves. The SLM-ed samples with contact angles higher than 90º are hydrophobic, but the small contact angle of 46.98º reflects the hydrophilic features of as-rolled Ti-6Al-4V alloys. The combinatorial recipe of SLM-ed Ti-6Al-4V alloys with 0 – 53 μm powders is optimal for improvements on the corrosion resistance.","PeriodicalId":18298,"journal":{"name":"Materials Science-medziagotyra","volume":null,"pages":null},"PeriodicalIF":0.8000,"publicationDate":"2023-02-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Combinatorial Effects of the Recipes of the Initial Gas-atomized Powder Sizes on Microstructure and Passivation Characteristics of the SLM-ed Ti-6Al-4V Bulk Alloys\",\"authors\":\"Yu Zhang, Jiazhuo Lei, Z. Dan, Hui Chang, Lian Zhou\",\"doi\":\"10.5755/j02.ms.31220\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"Bulk Ti-6Al-4V alloys have been fabricated by selective laser melting (SLM) in three recipes with different combinations of powder sizes. Combinatorial effects of initial gas-atomized powder sizes on microstructure and corrosion properties of SLM-ed Ti-6Al-4V alloys have been investigated by optical microscopy, X-ray diffraction, electrochemical measurements and surface free energy. The SLM-ed Ti-6Al-4V alloys are composed of acicular α' martensite and α phases. Many pinhole defects and twin boundaries exist in the SLM-ed Ti-6Al-4V alloys. According to electrochemical tests and surface free energy calculation, the SLM-ed Ti-6Al-4V alloys with 0 – 53 μm powders have the most positive corrosion potential, the lowest current density and the smallest surface free energy of 20.89 mJ m2. The passive film of SLM-ed Ti-6Al-4V alloys with 0 – 53 μm powders has superior protection ability due to their large thickness. The carrier concentration of SLM-ed Ti-6Al-4V alloys with 0 – 53 μm powders is the lowest by the Mott-Schottky curves. The SLM-ed samples with contact angles higher than 90º are hydrophobic, but the small contact angle of 46.98º reflects the hydrophilic features of as-rolled Ti-6Al-4V alloys. The combinatorial recipe of SLM-ed Ti-6Al-4V alloys with 0 – 53 μm powders is optimal for improvements on the corrosion resistance.\",\"PeriodicalId\":18298,\"journal\":{\"name\":\"Materials Science-medziagotyra\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":0.8000,\"publicationDate\":\"2023-02-24\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Materials Science-medziagotyra\",\"FirstCategoryId\":\"88\",\"ListUrlMain\":\"https://doi.org/10.5755/j02.ms.31220\",\"RegionNum\":4,\"RegionCategory\":\"材料科学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q4\",\"JCRName\":\"MATERIALS SCIENCE, MULTIDISCIPLINARY\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Materials Science-medziagotyra","FirstCategoryId":"88","ListUrlMain":"https://doi.org/10.5755/j02.ms.31220","RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"MATERIALS SCIENCE, MULTIDISCIPLINARY","Score":null,"Total":0}
Combinatorial Effects of the Recipes of the Initial Gas-atomized Powder Sizes on Microstructure and Passivation Characteristics of the SLM-ed Ti-6Al-4V Bulk Alloys
Bulk Ti-6Al-4V alloys have been fabricated by selective laser melting (SLM) in three recipes with different combinations of powder sizes. Combinatorial effects of initial gas-atomized powder sizes on microstructure and corrosion properties of SLM-ed Ti-6Al-4V alloys have been investigated by optical microscopy, X-ray diffraction, electrochemical measurements and surface free energy. The SLM-ed Ti-6Al-4V alloys are composed of acicular α' martensite and α phases. Many pinhole defects and twin boundaries exist in the SLM-ed Ti-6Al-4V alloys. According to electrochemical tests and surface free energy calculation, the SLM-ed Ti-6Al-4V alloys with 0 – 53 μm powders have the most positive corrosion potential, the lowest current density and the smallest surface free energy of 20.89 mJ m2. The passive film of SLM-ed Ti-6Al-4V alloys with 0 – 53 μm powders has superior protection ability due to their large thickness. The carrier concentration of SLM-ed Ti-6Al-4V alloys with 0 – 53 μm powders is the lowest by the Mott-Schottky curves. The SLM-ed samples with contact angles higher than 90º are hydrophobic, but the small contact angle of 46.98º reflects the hydrophilic features of as-rolled Ti-6Al-4V alloys. The combinatorial recipe of SLM-ed Ti-6Al-4V alloys with 0 – 53 μm powders is optimal for improvements on the corrosion resistance.
期刊介绍:
It covers the fields of materials science concerning with the traditional engineering materials as well as advanced materials and technologies aiming at the implementation and industry applications. The variety of materials under consideration, contributes to the cooperation of scientists working in applied physics, chemistry, materials science and different fields of engineering.