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首页> 外文期刊>Materials Characterization >Comparison study on microstructure and mechanical properties of Ti-6Al-4V alloys fabricated by powder-based selective-laser-melting and sintering methods
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Comparison study on microstructure and mechanical properties of Ti-6Al-4V alloys fabricated by powder-based selective-laser-melting and sintering methods

机译：基于粉末选择性激光熔融和烧结方法制备的Ti-6Al-4V合金微观结构和力学性能的比较研究

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摘要

To better understand the structure-mechanical properties relation of additively manufactured Ti-6Al-4V (Ti64) alloys, a comparison study was performed on Ti64 alloys fabricated by powder-based selective laser melting (SLM) and sintering methods. It is found that the SLM Ti64 alloy has prior beta grains filled with (lath alpha + needle alpha') structure. While Ti64 alloys sintered over and below beta -> alpha transformation temperature have widmanstatten alpha + beta and lamellar alpha + beta structure, respectively. The SLM Ti64 alloy has higher strength and hardness than sintered alloys, but possesses similar Young's modulus to the spark plasma sintered alloy. The mechanisms leading to the different mechanical properties are discussed based on phase compositions and contents. The results suggest that SLM Ti64 alloys potentially have better mechanical performance compared with those fabricated by conventional sintering methods.
机译：为了更好地理解加含有Ti-6Al-4V（Ti64）合金的结构 - 力学性质关系，对由粉末的选择性激光熔化（SLM）和烧结方法制造的Ti64合金进行比较研究。 结果发现，SLM Ti64合金具有填充（Lathα+针α'）结构的β谷物。 虽然Ti64合金在β->α->α->α->α->α转化温度下分别具有WidmanStattenα+β和层状α+β结构。 SLM Ti64合金具有比烧结合金更高的强度和硬度，但具有与火花等离子体烧结合金相似的杨氏模量。 基于相 - 组合物和内容物讨论导致不同机械性能的机制。 结果表明，与传统烧结方法制造的那些相比，SLM Ti64合金可能具有更好的机械性能。

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