Reprint: Boron modified titanium alloys
Reprint: Boron modified titanium alloys
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DOI：
10.1016/j.pmatsci.2021.100815
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发表时间：
2021-05
影响因子：
37.4
通讯作者：
Gaurav Singh;U. Ramamurty
中科院分区：
文献类型：
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作者：
Gaurav Singh;U. Ramamurty
钛及其合金广泛应用于各种高性能应用中，其中α + β合金Ti-6Al-4V最受欢迎。传统的钛合金在铸态下具有非常粗大的原始β晶粒，其尺寸在~ mm量级，这样大的晶粒尺寸不仅降低了合金的强度，而且也影响了其加工性能。添加约0.1重量%的B可导致晶粒尺寸显著减小。本文综述了钛合金中微量添加B所引起的组织细化的优点。由于B的加入，晶粒细化的铸态合金的加工响应得到了改善，从而有可能去除或最小化一次铸锭分解步骤。这可以显著降低成品钛合金部件的成本。本文综述了B对合金室温和高温力学性能的影响，并着重讨论了组织与性能的关系。
Titanium and its alloys are extensively used in a variety of high performance applications with the α + β alloy, Ti-6Al-4V, being the most popular. Conventionally Ti alloys in the as-cast condition possess highly coarse prior β grains, whose size is in the order of ~mm. Such large grain sizes not only reduce the strength of the alloy, but also impair its workability. The addition of about 0.1% wt.% B can result marked reduction in the grain size. The advantages offered by microstructural refinements, thus induced by trace addition of B in Ti alloys, are reviewed in this paper. Processing response of the as-cast alloys improved as a result of grain refinement due to B addition, leading to the possibility of removal or minimization of primary ingot breakdown steps. This can significantly bring down the cost of the finished Ti alloys components. Microstructural refinements with B addition on the mechanical performance of the alloys both at room and elevated temperatures are reviewed with emphasis on the microstructure-property correlations.