A New Low-Cost beta-Type High-Strength Titanium Alloy with Lower Alloying Percentage for Spring Applications

作者：Zhao Xiaoli^*; Sun Shuchen; Wang Lei; Liu Yandong; He Jidong; Tu Ganfeng

来源：Materials Transactions, 2014, 55(9): 1455-1459.

DOI：10.2320/matertrans.M2014174

• titanium alloy
• high strength
• low alloying percentage
• low cost
• spring applications

Spring applications require materials that possess a low Young's modulus and high strength, in addition to having a lower alloying percentage for reduced costs. In this study, a new low-cost beta-type titanium alloy with a lower alloying percentage than conventional beta-type alloys was developed for spring applications using [Al](eq) and [Mo](eq). The alloy is located in the near-beta region and its beta transus temperature is about 1023 K (750 degrees C). This alloy could be cold rolled to a reduction ratio of 86.7% without any intermediate heat treatment. The solutionized alloy exhibits an ultimate strength of 925 MPa, a 0.2% proof stress of 910 MPa, an elongation of 18%, and a Young's modulus of 78 GPa; the comprehensive characteristics are better than those of conventionally used alloys (Ti-15-3 and beta C) for spring applications.

• 出版日期2014-9
• 单位东北大学