首页> 外文会议>International Symposium on Eco-Materials Processing amp; Design; 20050116-18; Jinju(KR) >Effect of Ti addition on the fracture toughness of Al-Ti-B alloys synthesized by high-energy ball milling and spark plasma sintering
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Effect of Ti addition on the fracture toughness of Al-Ti-B alloys synthesized by high-energy ball milling and spark plasma sintering

机译:钛添加对高能球磨-等离子烧结合成Al-Ti-B合金断裂韧性的影响

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摘要

Al alloys containing boron or its compound are attractive for neutron shielding materials since boron exhibits high thermal neutron absorbing capability. However, poor fracture toughness and low ductility of boron compounds restrict their usage as structural materials. By adding Ti as a third element, it is expected to improve the toughness of Al-B alloys. The present study investigates the effect of the Ti addition on fracture toughness of the (Al+Xat%Ti)2at%B (X=0.5,1,1.5 at%) alloy fabricated by high energy ball milling and spark plasma sintering (SPS). The SPS method was used to consolidate (Al+Xat%Ti)2at%B (X = 0.5,1,1.5 at%) alloy with the pressure of 50 MPa. Charpy impact tests showed that the fracture toughness of the 1 at%Ti added-alloy was 4 MPam~(1'2), and that it was three times higher than that of Al-B alloys. Further reduction of the Ti addition down to 0.5 at% at 1.9 MPam~(1/2) or up to 1.5 at% at 2 MPam~(1/2) slightly decreased the fracture toughness. The microstructures of the present specimens were investigated by FE-SEM and TEM to describe the relationship with fracture toughness.
机译:含硼或其化合物的铝合金对于中子屏蔽材料具有吸引力,因为硼具有很高的热中子吸收能力。然而,硼化合物的差的断裂韧性和低延展性限制了它们作为结构材料的用途。通过添加Ti作为第三元素,有望提高Al-B合金的韧性。本研究研究了添加钛对通过高能球磨和电火花等离子烧结(SPS)制备的(Al + Xat%Ti)2at%B(X = 0.5,1,1.5 at%)合金的断裂韧性的影响。 SPS方法用于在50 MPa的压力下固结(Al + Xat%Ti)2at%B(X = 0.5,1,1.5 at%)合金。夏比冲击试验表明,添加1 at%Ti的合金的断裂韧性为4 MPam〜(1'2),是Al-B合金的3倍。 Ti的进一步减少在1.9 MPam〜(1/2)时降至0.5 at%或在2 MPam〜(1/2)时降至1.5 at%会稍微降低断裂韧性。通过FE-SEM和TEM研究了样品的显微组织,以描述其与断裂韧性的关系。

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