SBIR Phase II: Spray Forming Titanium Alloys Using the Cold Spray Process

这个小企业创新研究第一阶段项目建议开发一种新的低成本方法，以近净形状（NNS）直接制造金属零件。这项技术对许多行业至关重要，特别是对制造昂贵的金属和合金（如钛）的零件。这些技术对许多行业都有影响，因为它们有可能以最小的浪费快速制造复杂的零件。目前使用的方法通常涉及熔化和凝固，这可能导致高残余应力，不良相和其他问题。为了解决上述问题，采用了一种新的喷射成形方法。该方法基于使用冷喷涂工艺，避免了与热喷涂成型方法相关的不期望的材料、化学和相特性。在第一阶段进行的研究证明了冷喷涂工艺用于快速成型和直接制造钛合金喷雾形状的可行性。这项活动的预期结果是提供一种技术，使喷射材料具有优越的材料性能，并降低制造成本。近净形冷喷涂技术的广泛影响可能是航空航天，包括飞机，军用飞机和航天器非常重要的技术。这项技术在汽车、医疗、电力、化工、体育用品等许多其他行业都很有前景。该研究活动将加强对基于高速颗粒流的喷雾过程的科学和技术理解。

This Small Business Innovation Research Phase I project proposes to develop a new, low-cost methods for direct fabrication of metal parts at near-net shapes (NNS). This technology is critical for many industries and in particular, for manufacturing parts of expensive metals and alloys such as titanium. Such technologies have an impact on many industries because of the potential to quickly manufacture complicated parts with minimal waste. Currently used methods typically involve melting and solidification, which can cause high residual stresses, undesirable phases, and other problems. To solve the problems described a new method for spray forming is being used. This method is based on using the cold spray process avoiding undesired material, chemistry, and phase properties associated with thermal spray-forming methods. Studies conducted during Phase I demonstrated the feasibility of the cold spray process for rapid prototyping and direct fabrication of spray form shapes of Titanium alloys. The anticipated result of this activity is to deliver a technology yielding superior material properties of sprayed material and reduce cost of manufacturing.The broader impacts of cold spraying near net-shapes technology could be very important technology for aerospace, including aircraft, military aircraft and spacecraft. This technology is promising for many other industries including automotive, medical, power, chemical, sport goods, and others. The proposed research activity will enhance scientific and technological understanding of the spray processes based on using high-speed particle flow.