John (Jack) Peurifoy – Heat Treat Today 40 Under 40
After completing his Bachelor of Science in Metallurgical Engineering at Georgia Tech, John (Jack) Peurifroy joined Timken R&D in June 2019 and was promoted to materials engineer in 2021. In his time at Timken, he has become a subject matter expert in multiple fields. Jack played a pioneering role in the development of austemper heat treatment for ultra large bore (wind energy) bearings, published a paper in a highly reputed journal, and investigated the root cause of grind injury in aerospace bearings.
Jack’s recent publication in CIRP Annals (Impact factor 5.2) investigated the effects of variations in bainitic microstructure on grinding specific energy. This was a one-of-a-kind, multidisciplinary approach to improve efficiency in grinding by optimizing the material microstructure.
Besides his strong knowledge of heat treatment and finishing technologies, Jack is a data science expert. He collected and analyzed over one thousand dilatometry data files that had been created over the past fifteen years. Using python libraries, he created Time-Temperature-Transformation diagrams for different bearing steel grades. As a result, he created an austempering cycle development guide for Timken’s department which will be used for years to come.
Jack’s current assignments are project leader for the austemper development of new bearing steels to realize material cost savings in Timken bearing facilities, project contributor for developing austemper cycles for ultra-large bore bearings for the wind energy industry, and project leader for aerospace project pertaining to the mitigation/prevention of white layer formation during finishing processes. Jack also assists in the post-HT CMM measurement & metallurgical inspection plan of ULB customer bearings for wind energy applications.
Jack’s qualifications are unique, rare, and outstanding. He will continue making strides in the heat treat technologies for years to come.
Company: ThermoFusion, Inc.
Position: Quality Manager
Years in Industry: 9
Nominated by: ThermoFusion, Inc.
Although with ThermoFusion for less than a year, Katie Bastine is using her nine years of industry experience to modernize and streamline the quality system, leading the company to a complete ISO9001, AS9001 and Nadcap recertifications, and adding new Nadcap certified processes.
Specifically, Katie brought all TUS and SAT work in-house, including procuring the equipment, training the operators, and validating the work. She then prepared herself and the company for a series of audits, which ThermoFusion passed with only two major findings. During that process, Katie more than doubled the Nadcap certified processes in which ThermoFusion had been previously certified.
Katie’s dedication to her job has resulted in greater opportunity for ThermoFusion and customers and allows the company to remain one of the top-quality heat treating shops in the Western U.S.
